FAMILIES: Rep. Lynn Woolsey (D-Petaluma) is introducing her gay son, Michael, 30, to House colleagues, saying that he will put a "real face" on homosexuality for lawmakers weighing the ban on gays in the military. Woolsey and other parents of homosexual men and women are lobbying to end the prohibition. . . . Last month, Sen. Claiborne Pell (D-R.I.) disclosed that his daughter, Julia, 40, is a homosexual as he urged the Senate to approve the nomination of Roberta Achtenberg, a lesbian, to a post in the Administration. . . . Wedding bells will ring next year for the daughter of Sen. Barbara Boxer (D-Calif.) and the brother of First Lady Hillary Rodham Clinton. Nicole Boxer, 25, is pursuing a career in writing and film production in the nation's capital. Anthony Rodham, 38, a former private investigator based in Florida, is a field director for the Democratic National Committee.