If you want labels which do both inclusions and exclusions using wildcards, without getting into regular expressions or scripting, then you can do that.
Instead of creating a Wildcard Label, click the button to the left of it which creates a label using a Filter instead. You can then define multiple Name conditions with wildcards which need to match to not-match the filenames.
I said in the old thread to stick to Wildcard Labels if all you need is a wildcard, since they're less complex. But if you need more complexity (including multiple wildcards and boolean logic) then that's exactly what Filter labels are for. And if they are just doing multiple wildcard patterns, they won't cause any trouble. (Trouble starts when Filter labels start doing things that are expensive to calculate, such as things that require opening every file to get information from it.)