The Salina, KS region runs a Ladies version of all the normal classes. I (male) ran STF and a friend (female) borrowed my car and ran STFL.
For PAX we treat them the same as the non-L classes. To do anything else would be saying that they are at a natural disadvantage, which is not the case. Many women drive in the standard classes and do very well. Some of the women only run in the L class so they don't take the points away from their husbands when they beat them in the same car.
Wish I could get my girlfriend to autocross with me, but she freaks out driving through construction sites. Cones scare her for some reason.