As a global moderator, you should have some manner of control in ALL forums. To what extent that control is, I have to confess I'm not sure offhand.
EDIT: Just checked, and it looks like you have pretty much full control over topics and posts. You can sticky, lock, move, split, modify content, etc. But control over other members and the forum controls remain solely with the admins. For now, at least.
Moderators of select boards would have similiar controls over topics in that board(S), but no other boards. Global moderators like yourself, FM, get that control everywhere.