Partial Moderation

[Burns]

Hi!
Could anyone tell me if there is a hack,
to enable moderation in general
( guests and registrated users can post but moderated ),
but to set some users to "avoid" moderation ?
( or even better to add to "avoid moderation"-group )

Sure the easiest way would be make them moderators,
but i dont want to give these users any mod. permissions,
and they should not waste thier time approving
thier own posts anyway...

thanks in advance

Burns