Active directory and sql table mapping

Hi,
I have 2 users(for example: user1, user2) in the Active Directory. 
I have a SQL table called "tblRolesforUser". It has columns like UserId, Role type, Permission type, Project Id.
In the table:
User1 has Role type as Manager and Permission type as Contributor, and ProjectId as P001.
User2 has Role type as Manager and Permission type as Contributor, and ProjectId as P002.
I am creating a aspx page in Visual studio 2010, to add details of projects. User1 should not be adding or viewing information for project id "P002" and should add or view information for P001 only.
How to achieve this?
Thank you
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