Each audit produces multiple log entries. But the zone name is not always mentioned. It will thus be difficult to tell them apart in a multi-threaded/multi-zone environment.
Would it be possible to have the zone name in each log entry?
E.g:
Jan 6 20:49:32 hidden-master ods-auditor[22569]: bellgrim.se: SOA differs : from 2011121300 to 2012010600