I was trying UAM in the past two days. All is well, except that UAM does not seem to come with the option to set the default user group for new posts, pages, and files.
For posts, I can easily work around this limitation by doing this:
- Create a category;
- Associate a user group with this category;
- Setting the "Default Post Category" option in [Settings] -> [Writing].
So when I write a new post, the default category is applied, which in turns restricts the post to the user group automatically.
However, there does not seem to be a workaround for pages and files.