SharePoint Dragons

This one http://msdn.microsoft.com/en-us/library/gg615945.aspx is a nice starting point for creating a custom claim provider. It actually shows a nicer way to retrieve the user name as the one presented in our own article https://sharepointdragons.com/2012/04/26/claims-in-sharepoint-2010-the-sequel/, like so:

// Decode user name from SAML token. string userLoginEncoded = SPUtility.FormatAccountName(“i”, entity.Value); string userLogin = SPClaimProviderManager.Local.DecodeClaim(userLoginEncoded).Value;

And uses audiences as a basis for assigning claims.