Ooooooooooh very nice work!
Restrict plugins per group
Is there any off-the-shelf solution to restrict a plugin for a set of group? Or any "easy" solution to do such?
Not really, no. It is up to the plugin itself to support restriction by group. Which plugin were you referring to?
basically the question popped while thinking of installing plugin-adsense (which does not worked at all for me btw - 1.11.2)