Probably. Pelvic rest usually refers to vaginal intercourse. Clitoral stimulation should not be a problem in most situations. You should always consult with your physician who knows why you are on rest and then you will get the best answer to this and other questions. Best wishes.
Probably not. Pelvic rest means no sex, no douching, and no tampons. While rubbing the clitoris is not sex, it could lead you to doing things you should not.