Dynamic Filtering enhancement

Tailoring (i.e. dynamically hiding or filtering) the list of contact sources available based on the App Group being used 
E.g. If someone chose the Bet app group, we wouldn’t want gaming lists to be visible, or at the very least, for the Mobile_Push_Users database to be hidden.

If that isn’t possible, would either of these alternatives be feasible: 
a. Could we generate a confirmation screen whenever the Mobile_Push_Users database is chosen to confirm it is the source the user intended to choose?
b. Could we remove the option to send to any full Database lists altogether?