@periko yeah if you don't want that whole network to not nat, then yeah that would work.. I would pick IPv4 only on such a rule. And you would need to need to make sure it in the correct location in your hybrid rules - they evaluate in order.
So you created a hybrid nat, or your doing manual nat.. I never understand why anyone would do manual.. If you need to do something other than the normal automatic nat, then just create a hybrid rule for the stuff you want to do different, etc.