NetSqlAzMan (SnapIn Console) already supports the ability to restrict access for both reading and in administration of a Store or a single
This feature is provided in the guidance as Store Permissions and Application Permissions.
For each store / Application there are two SQL DB roles: Managers and Readers.
First you must create a SQL login (Windows or SQL account) then by SnapIn right click on the NetSqlAzMan Store / Application node of and choose
the Store / Application properties.
Then press the "Permissions" button and check which roles belong to users.
For eaxample, an Application Manager can handle all of such an application but the console will show you only one application you are managing
and not the others.
I think this is the feature you were looking for.
NetSqlAzMan Project Coordinator