I recently learned of a free (donation-funded) service, siftrss.com, wherein you can take an RSS feed and do text-based filtering on any of its fields to produce a new RSS feed. (I’ve made a few feeds with it and it seems to work well.) I suspect you could filter based on the “category” field.
I recently learned of a free (donation-funded) service, siftrss.com, wherein you can take an RSS feed and do text-based filtering on any of its fields to produce a new RSS feed. (I’ve made a few feeds with it and it seems to work well.) I suspect you could filter based on the “category” field.