@osirisguitar You may want to try my plugin featured-topics-extended, it comes with the widget Featured Topics List, which displays a list of topics just as they would appear on the category page. Admins can select exactly which topics to display in the Topic Tools menu when visiting a topic.
Here is an example with two topics selected.
Should give you some ideas, the active users widget changes behaviour based on where it is displayed, if its inside a topic it shows the poster in that topic, if its inside a category it shows recent posters in that category etc. widget.area.url gives the url of the page the widget is in.
@Florian-Müller said in Ban single Users from Category:
@julian Do you see an easy/nice way how to solve this problem?
A not very practical way would be to create a group for each category. Unless you write a plugin or script to ease the pain of management it will be headache inducing.