Restrict users ability to join Webex Spaces

Restrict users ability to join Webex Spaces outside organization

Currently CH lets us restrict users from joining meetings outside of our organization but we would like that option available for Webex Spaces and be able to manage it by Groups. We have K12 students that we want to restrict to only join Spaces in our organization but need staff to be able to join any space. We use AD groups to manage licenses and would like to see this available as an option when creating a template.