If what you mean is "can I have a non-clustered Volume Group alongside cluster
volume groups", then the answer is "yes". There is a flag on the VG that
indicates whether it is clustered or not. activated with vgchange -cy,
deactivated with vgchange -cn. You can't mark individual LVs within a VG as
clustered/non-clustered though. That wouldn't make sense.
Well, I think I have a bug to report. When I create a vg and mark it as not clustered, I get locking errors when working with its LVs.