Sure. You can see how that works right here on Meta.
Go to meta.discourse.org and you see everything. Go to Support - Discourse Meta, and you see just support (and its sub-categories). Same for meta.discourse.org/c/feature, meta.discourse.org/c/bug, etc.
If you don’t like the /c in the URL, you can eliminate it by using permalinks, but this would have to be done manually. For example, I created a permalink for support, so you can visit Support - Discourse Meta (open that link in a new tab, internal routing doesn’t support permalinks), but you cannot visit meta.discourse.org/bug as no such permalink exists.
