MojoBlog supports what we call pseudoMU or, kinda multi-user blogging capabilities. It works on a structured category hierarchy and user/member permissions assigned by the mojoBlog administrator.

I’ll outline below:

A new member joins (or, is added manually in the users list by you).
The blog admin (you) select the member’s account and “promote” them to a membership level.
The blog admin then “creates” the members category (in this case, mojoBlog/1guy) where mojoBlog is the main category and 1guy is the publishing author’s category.

The result, a new members blog which you can see by looking at the mojoBlog categories (top right column).