I haven't tested Clubs, but I'll take a look!
That's a good idea, I'll see if I can make this an option.
I'm working on a new version now, hopefully released later this week or early next week.
What you're describing here is the built-in tags feature, though I'm not sure if you can require one or more tags. My plugin currently does not and will probably never allow you to mark a topic with more than one marker.
I'll take a look, but I don't think that's something this plugin will be able to provide. After all, the plugin is named Mark Topic, not Mark Topics and Posts. 😄