PortSight Secure Access is the most flexible .NET component for user management and access control.

PortSight Secure Access allows you to secure ASP.NET, Web content, WinForms and Web Services. It ensures:
management of user accounts and groups
forms and Windows NT authentication
role-based security and permissions management
auditing trail for tracking user activities
Web content access
import from Active Directory, Windows NT domains and ODBC
delegated administration and other great features.