This feature is available in all editions.
Follow these steps to learn how to add a new Member Group.
To set up a Member Group, your Admin Privileges role must be set to "Member Admin" or higher.
Select Admin > Member Admin > Members > Member Groups.
Click the Add Member Group button, and then enter a Title and Description (optional).
Now, you can start adding members to the group. See Assigning Members to a Member Group for instructions.