Fairfax Supervisor Audrey Moore yesterday told more than 400 of her most committed critics -- developers, builders and real estate brokers who thrived during the county's commercial boom -- that she wants to change the way they do business.

"It's not my objective to try to do something punitive or hurtful," she said, holding to her longstanding view that the county's growth should be checked. "The people in this county want what I'm talking about . . . I would hope you would accept that this is something that has got to happen."

Despite her audience, Moore made no attempt to shift to conciliatory tones or to soften her message that things had to change, that developers have been given a free hand too long, that more controls are necessary.

Furthermore, she pledged to renew an attempt to restrict severely the amount of office construction that is now permissible on more than 10,000 acres in the county zoned for industrial use.

That proposal, which the county board defeated on a 5-to-4 vote last December, was vigorously opposed by almost everyone in yesterday's audience.

In addition, Moore said she would urge tougher requirements for builders to ensure that they pay for more roads, sidewalks and other public improvements.

Moore, a Democrat who represents central Fairfax's Annandale District, is challenging Republican Board Chairman John F. Herrity in the Nov. 3 election for chairman of the Board of Supervisors.

Herrity, who has been board chairman since 1975, enjoys the support of the real estate development industry, which has contributed heavily to his campaign.

Both Moore and Herrity spoke at the luncheon forum of the Northern Virginia chapter of the National Association of Industrial and Office Parks at Tysons Corner.

When Herrity was introduced, association President Randall W. Byrnes called him the chairman "who presided over the most dynamic growth in this county's history."

Herrity was interrupted by applause when he said he would not support measures that would stunt growth.

He continued to hammer away at Moore for voting at times against several major road projects, including I-66 inside the Capital Beltway and the Dulles Toll Road.

Earlier this week he told The Washington Times, "I have absolutely no respect for my opponent at all."

He also said that Moore had so little support on the board that "she couldn't get a second to go to the bathroom."

Moore opened her speech by calling attention to those comments, saying they "have no place in this campaign or any campaign."

"I know this is a hard campaign for my opponent. He is faced with the cold reality that he has rubber-stamped tremendous growth even though he knew he did not have the matching transportation network . . . . " she said.

Herrity said in an interview later that his comments about Moore were "unfortunate," adding that she had also made derogatory comments about him, although he refused to be more specific.

Moore has said repeatedly that although she wants more controls on growth, she will deal fairly with developers and does not want to stop or derail the county's prosperity. Her audience yesterday seemed skeptical.

Peter T. Scamardo, president of Centennial Development Corp., one of the county's largest commercial developers said, "Basically what she said today was she's going to stop growth."

Robert C. Kelly, a spokesman for Hazel/Peterson Co., an influential development firm, asked Moore to name five methods she would use to control growth.

Moore responded that she would toughen construction standards, adding, "As to what else is needed, I don't know . . . . We're going to have to deal with {development} in a fair way, in a comprehensive way, without picking on any one individual."

Peter L. McCandless, the association spokesman, called Moore "derelict" for talking about her intention to study methods of controlling growth while lacking any specific program to do so. "I've been critical of Audrey and now I'm even more critical," he said in an interview.

Herrity, delivering his standard campaign speech, branded Moore's policies a return to the slow-growth policies that the county pursued in the early 1970s. "That policy was a failure," he declared.

Herrity said he was proud of the county's breathtaking economic expansion, much of which has taken place in the 12 years that he has held Fairfax's top elected position.

When Herrity was asked about the proposal to restrict office construction on industrially zoned land, he replied, "There's no need to bring it back." The audience applauded.

In response to a question about transportation, Herrity listed several road projects -- including the planned Springfield bypass, the widening of Rte. 28 near Dulles International Airport and the proposed outer beltway -- as examples of his leadership on the issue.

Answering the same question, Moore upbraided Herrity for having "swamped" the county's roads with new developments. She also pointed to road improvements in Annandale District, including the widening of Braddock Road "a year ahead of schedule."

Turnout at the luncheon set a record for the Northern Virginia chapter, organizers said. "Never before have the issues been so clear," said Byrne, the chapter president. "Never before have candidates felt so strongly in opposition to each other."