How about offering the option to search by ladies that offer strap on play? I am sure that must have been mentioned before.
It has been suggested before in the more general context of Toys. It was also a suggestion that, maybe, got TER to add "check all that apply" capability to the new review form and Profiles.
See these threads, for starters, and I think there are even older ones:
http://www.theeroticreview.com/discussion_boards/viewmsg.asp?MessageID=13720&boardID=4&page=#13720 (also the hot link, below)
http://www.theeroticreview.com/discussion_boards/viewmsg.asp?MessageID=14540&boardID=4&page=#14540
I think there is a perception that Strap on play falls into the Domination category. There are gents who like the play but aren't into pain or bondage.
Check out P411 profiles in your search.