aspnetdb tables within general database and multiple databases for the website.

Hi,

I am creating a website which multiple organisations will be using. Each organisation will have its own database which they will log into. I would like to use the authorisation and security modules from ASP.net.

The aspnetdb is set up out of the box with its connection strings and provider information in the web config. I will required each database to have its own aspnetdb tables inside each organisations database. 

Becuase I only have the one webconfig, how do I create a different provider which redirects the auth and auth calls to the database the user wants to log into?

Thanks
Jeff