Ghost blog and internal knowledge base in one. Is it doable?

So I would like to create a setup like this. There are blog posts and indoor posts of how things are done etc. Some blog posts like the ultimate guide to buying a mobile are of interest to employees and should be shown in KB(knowledge base). So employees can see them and internal password-protected ones. But visitors can see only blog posts. Employees can see that looks something like this. But visitors see only the standard blog front. Is that kind of a setup possible or should I make separate kb?

You can easily make a selection of posts visible to a group of (signed-in) members of your choosing, and not visible to anyone else.

Meta question for the mods/staff: I just noticed this question was posted on July 19. Why was it at the top of the “Latest” section?