User-1704326042 posted
Hello Arjuna,
as the names states, Windows Identity Foundation, it is meant for windows, claims based authentication, while you need a custom database, not active directory.
In my opinion you have to use the membership and Role providers against your database
Here's the website on WIF, you might have come across it already, but just so you make sure you have a clearer idea on Windows Identity foundation if you wish.
http://msdn.microsoft.com/en-us/security/aa570351.aspx
Best Regards,
O.D.