I just discovered that there is already the possibility to have category based feeds with the Podlove Publisher. I just tried it and it works well. But at the moment the name of the podcast (feed) is the same as the "original" feed with all episodes. It would be nice if the category based feed's name would include the category like "Podcast name (Category)".
@timpritlove, @ericteubert, is this on your agenda?