Otherwise I think it could be done via the hook filter:topics.addPostData? Just iterate over the posts array, get the category, and for every user of a post add an object to custom_profile_info with the property content set to some HTML indicating moderator rights?
Probably this... alternatively, use the groups method, but hook into filter:topics.addPostData to remove the group badge if they're not in the category that user moderates?
@julian@pichalite Any idea if this can be done with some CSS around a widget image? I.e., Only displaying an image in a specific category? The closest key I see is:
<span itemprop="title">Category Title</span>
But I think we'd have to check that value using the DOM in javascript?
