In translate5 frontend and backend you are able to define which user roles can be modified/created to other users.
For this purpose acl resource 'setaclrole' can be used.
Example when the users with role 'pm' are only able to modify or add a 'pm' role to other users.
Insert in the acl rules table the following records:
module:'editor'
role:'pm'
resource:'setaclrole'
right:'pm'
Insert new record in the table if you want to extend the user capabilities for creating/modifying acl roles to other users.
For each role combination a separate record in the table is needed.