If they use the dbuzz tag then you can do this

If they don't then not sure what the option would be presently. If hivemind is updated to give us some more API calls that would be great.

Not sure if filter by posting application is an option... cc @asgarth
On the other hand some people are requested a way to ONLY see short form content and that needs to be beyond just dbuzz as more sites come out with short form posting options.