Restricting Data Access in MDriven can be achieved in 3 ways which are:

Below is a sample model, with a singleton class that has 2 attributes: Allowed Access and Interested as Booleans.

Access Groups

Create Access Groups through the AccessGroups editor in the Designer as shown below: Add the Ocl Expression below in the View Enable Expression (Enable of ViewModel edit Controls)

Singleton.oclSingleton.AllowedAccess

Interest Groups

ViewModel-Enable