Question re Sexkey & Freenet pass
 

I'm building a new interactive site. It is free but new users must sign up on a page protected by a Sexkey or Freenetpass entry page. QUESTION: Do any of these AVS programs pass the username [ie., login name only] to my system so that my system will only verify unique login names?

No, that would probably create a security problem. Try tracking users a different way, by IP for instance, or setting a cookie.