Your question is a bit unclear. I understand that you want to separate blog posts by some criteria, ande currently you can approach this in several ways:
- use separate blogs
- use blog categories
- use blog post tags
I would open a separate blogs for list A and list B. It is the easiest way to do it, you would not even have to open new pages, as URL rewriting would route all requests to the same physical page, and blog container knows how to parse the blog name from the URL.