I can't find the settings for the cbpb latest module that allow to show either "only post from connections" or "posts from all users".
Do these settings exist?
Such parameters don't exist.
Also I can't figure out how to automatically ad users profile blog posts to joomla articles.
Is this possible?
Easily with a parameter, no. However is possible if you edit the plugin and add a query to add an article to Joomlas content database table.