Assignee Group access
The Assignee Group group allows access to requests or fields on a per-user or per-group basis.
To provide Assignee Group access, you must add the Assignee Group field (field ID 112) to your form and then specify which users, groups, or roles should have access to the request in this field. Although you can set the Assignee Group field manually, it is typically set by workflow.
For more information, see Using the Assignee Group and dynamic groups--Examples.