Request's access to specific users
We found quite useful to allow specific users (normally, also requestors) to access other requesters' requests. This should be user based and not dependent on department or site. As example, I do not want my department or site colleagues to have access to my HR confidential requests, where I discuss about my pay slip and career management. I want to decide in which requests I want specific users (likely, also requesters) to access, being able to see all progress and status.