The Soapbox front end gives you what you're looking for unless I'm misunderstanding. The default feed only shows people you follow, and if you 'bookmark' (can'

The Soapbox front end gives you what you're looking for unless I'm misunderstanding. The default feed only shows people you follow, and if you 'bookmark' (can't remember the correct terminology) another server you get a feed that shows only that servers their timeline.