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I have a C# windows application written in VS 2010 that uses SQL Server Express database as the back-end. I'm finding that I have a need for having different users with different rights, to limit how much damage can be done by careless users. For example, one highly trusted user can mass delete and edit records for modifying large numbers of records while another user can only edit or delete individual records. A highly trusted user can access all of the screens while other users will only access a subset of those screens, etc. AFAIK this doesn't necessarily map very well to the authentication system built into SQL Server which manages user groups read and write permissions for each table. There is the possibility of just rolling your own custom authentication system, to add to the database tables for users, groups, and permissions and managing those accordingly. While this is a new problem for me, my hunch is that this would likely be a very old and familiar problem within windows development. I could certainly roll my own and make something workable if not great, but why not see how others with more experience are doing it.

Does anyone have any thoughts or recommendations on this subject? Any especially good examples that you could point me in the direction of?
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