ASP.NET, Open LDAP role based security

I have couple of applications developed in asp.net with authentication from Open LDAP. The applications are working fine and I am having no problem with authentication.

The main problem is to manage user roles and responsibilities and the requirements change quite frequently. Can any one suggest an open source framework to manage user roles or any other ways to manage user roles i.e. within open LDAP etc...

I have studied few commercial solutions like Visual Guard but am looking for open s开发者_开发百科ource.

You can implement custom Role provider using Novell's LDAP library for C# to perform queries against directory.

LDAP groups can be used as a backing store for roles.