Tags to show blogposts in specific group activity stream?

Can we use tags to show blogposts in a specific Group Activity Stream?

Say I have a blog post tagged “A” and I want all blogposts on the site
to show up in the Group Activity Stream of “Group A”
Is this possible? Preferably regardless of who posts.
As it is now I have no option in the Group Actively Filter to show blogposts at all.

I asked a similar question in another thread here, but this is another approach to try to achieve something similar. Blogposts posted to Group Activity streams, based on tags or user membership. Perhaps there is another way to achieve this?

thanx for any hints or help!
j