According to its profile description, the Community user can perform some actions like bumping old unanswered questions, deleting unwanted questions, tag tuning etc., but there are some unmentioned actions which are done by it. It also approves comment flags if it contains abusive language. It also deletes comments if there are three flags on a comment with no positive score. It does much more.
In the new days of Stack Overflow, Moderator Elections announcements on Meta were posted by the Community user. Well, it is known that some employee has written it. I have also seen a comment posted by it.
Is this posting behalf of Community possible only for employees? Can diamond moderators use Community and perform moderation activities like deleting comments?