No MOD needed. No admin permissions needed. Make a hidden group whose permission for all forums in Groups forum permissions, Advanced permissions, Misc tab, Can post without approval is Never. Then make the Moderators group leaders of that group and they can place users in it from their UCP, Usergroups, Manage users. Done.
good and VERY
inexpensive hosting CLICK HERE
I can stop all your spam. I can upgrade or update your Board.
PM or email me. (Paid support)