[Dovecot] Exclude Users from replication/sync

Hi All,

i'm searching for a way to exclude certain users from dovecots replication mechanism.

I can't use the first_valid_uid setting, because the uid of my pam (ldap) users und my system users are mixed up.

So, is there a way to limit my users i currently have in my userdb or somehow exclude specific uids from replication?

Thanks, Daniel