A/K/A

Margaret, raised with ever-changing names in a series of foster homes, assumes various names in her career as an "escort" for women. As Tamara, she supplies sexual favors for a minister's wife; as Melanie, she is hired to be "gorgeous" for an unattractive lesbian; and as Ursula, she dates - and provides cover for - the heterosexual female director of a gay and lesbian organization. Her most desperate identity, though, is law student Margaret Smyth, the name she hopes will rescue her from the others when she graduates. BJ, short for Beverly Jane, came to New York to model but found instead a…