This question already has an answer here:
If a particular community has a favorite tag, I would like for that question in the Hot Network Questions list to highlight. If I have a tag set to ignore, it will either grey out or not show at all (as determined by my preferences for that community and tag.)
It seems like there is some customization in this list because I've ignored certain communities and those do not show up in this list. It would be cool to take this one step further.