It’s a workaround, but I think you could achieve this by placing the users you want to strictly moderate in a group and then work with these settings maybe:
So if you set these to trust_level_1, and keep the specific users in TL0, that would only apply the need for approval to them.
Or, if you don’t want to restrict them in other ways and not use the trust levels, add everyone to a specific group (“the good guys”), except that single user, and use that group in this setting instead of trust levels.