In Foundation admin users now have to ability to restrict Activity usage to specific groups. Meaning only a list of defined groups with in the Activity can use it.

To do this an option must be turned on in the application settings. This can be found under the Admin & Settings > Applications > Application Settings > Foundation Hub. The option is under the Task section of the Foundation settings and its called "Request Task from Activity Costs"

Once this option has been enabled now a group(s) must be added to an Activity in the Activity Costs. Se the example below:

After this when hitting the Request button in the Tasks tab of Task Plan it will only show the groups under the activity costs.