A Prince George's County woman was sentenced to life in prison yesterday for her role in the Oct. 11, 1989, robbery of Stoney's restaurant in Clinton in which two restaurant employees were shot to death.

Christian Bowie, 21, one of five defendants in the case, was convicted in Prince George's Circuit Court last month of two counts of first-degree murder and numerous other charges. Judge Vincent J. Femia sentenced her to two consecutive life terms plus 60 years.

Although Bowie was the getaway car driver, and never entered the restaurant during the late-night $300 holdup, she was convicted of murder under a legal theory known as accomplice liability. The restaurant's manager and chef were shot to death and two other people were wounded, including an off-duty Prince George's police detective who was shot in the face.

The two men who carried out the holdup, Bowie's brother, Damon Bowie, 21, and James H. Edmonds, 26, were convicted in separate trials in recent months. Bowie, the gunman, was sentenced to die in Maryland's gas chamber and Edmonds was sentenced to 130 years in prison.

Another defendant, Derrel Thomas, 18, who acted as a lookout, was convicted of two counts of first-degree murder and numerous other charges last month and is to be sentenced Jan. 23. A fifth defendant is awaiting trial.