On your management dashboard, you can split your users into groups. For example, Pentesters, SOC, etc...

Head over to the "Users" tab, then "Groups," and click on "New Group":

Give your group a name, add users and then click "Create Group."

If you wish to delete a group, click on the group name and then "Delete Group":

Once you've created groups, you can assign tasks to them or use them as a filter in the reports tab.