How to Get Individual Blog Posts to Feed into a Main Topic Blog or Section

Such as
http://hubpages.com/topics/books-literature-and-writing/522

http://wordpress.com/#!/read/topics/

http://wordpress.com/#!/read/topic/music/

If a member starts a blog such as ACDC.mynetwork.com can I have their posts filter throuch a main topic blog or section related to music? e.g music.mynetwork.com