The waiters were all attention and envy yesterday at lunch when Rep. Tony Coelho walked into the Powerscourt restaurant with three little ol' farm girls -- Jane Fonda, Sissy Spacek and Jessica Lange -- in town to talk about the farm crisis . . .

Catherine Filene Shouse, who founded and donated the land for Wolf Trap, will be honored once more. The International Children's Festival is honoring her for her contributions to the performing arts at a Kennedy Center gala tonight. ABC News correspondent Bettina Gregory is the master of ceremonies for the evening, which will raise funds for the International Children's Festival that takes place at Wolf Trap on Labor Day weekend. Virginia Sen. John Warner will present the tribute to Shouse and Sen. Paul S. Trible Jr. will read the plaque presented to her . . .

Peter W. Bernstein, Washington editor of Fortune magazine, will join U.S. News & World Report the first week of June as a top editor (his title remains unsettled) for business, economic and personal finance coverage . . .

The American Veterans Committee will present four "Citizens First" awards Wednesday to Max Kampelman, one of President Reagan's delegates in Geneva in the recent strategic talks with the Soviet Union; Esther Peterson, former special assistant to the president for consumer affairs; Harold Russell, chairman of the president's Committee on Employment of the Handicapped; and Arthur S. Flemming, HEW secretary during the Eisenhower administration. The awards are being presented at a dinner celebrating the 40th anniversary of V-E Day . . .

In another unrelated commemoration of the end of World War II, the 40th Anniversary Allied Victory Film Festival will open May 23 at the American Film Institute theater. Legendary American filmmaker Frank Capra and Soviet filmmaker Irina Kalinina will be honored for their contributions to the art of documentary film. The evening is cosponsored by the International Film Exchange and Sovexportfilm, the film export office of the Soviet Union. Capra, better known for such Hollywood classics as "It Happened One Night" and "Mr. Smith Goes to Washington," also helped the American war effort with propaganda films for the "Why We Fight" series. At the opening night festivities, Kalinina's "Recollections of Pavlovsk" and Capra's "The Battle of Russia" will be shown. Four Soviet and four American films will be shows at the K-B Foundry theater in Georgetown from May 31 through June 6 . . .