Kathryn Grody, who stars with Diane Keaton and Carol Kane in ''The Lemon Sisters,'' currently showing at local theaters, will do a one-woman show called ''A Mom's Life,'' Sunday, Sept. 23, at 3 p.m. at Westminster Hall (515 West Fayette St.). All tickets are $10.
Grody is married to actor-singer Mandy Patinkin (''Dick Tracy''). Her show is ''about the joys and frustrations of being a mother.''
Grody is a two-time winner of the off-Broadway Obie Award. Her presentation is part of the Command Performance program sponsored by the University of Maryland at Baltimore. For more information, call 328 8035.