In Strategy Developer 9.4.1 and 10.x, administrators can edit a user and go to the Project Access tab in the User Editor to see where the user acquired their privileges from. This tab details how the privilege is inherited with detailed information about the group it is inheriting from, as shown below:

User's can also use Strategy License Manager 9.4.1 and 10.x to see which user is using what privilege and how they acquired it.
KB13885