Good question. The only female dom I know who's posted on this forum was more or less scared away by a less-than-desireable response to a vague call for help.
-Oh yeah, there are. I can't recall the names of any of them right now. Have you tried the forum search function?
If you go back out to where you can see all of the Talk threads, in the upper right hand corner will be the box "Search this Forum". Enter your search word IE "Female Domination", and go from there. You may be directed to another screen where it may prompt you to re-enter your search word. Just remember to highlight "BDSM Talk" as the forum you'd like to search. You also have the option of chosing to find threads or specific posts.
If you get a message telling you to wait 30 seconds between searches, remain patient. Searching can be frustrating sometimes.