Post moderation is where a post does not show on your forum until it has been approved. Simple:Press uses a couple of permissions actions to control post moderation.
The two permission actions are: Can bypass all post moderation and Can bypass first post moderation
Using these two permission actions, you can achieve the following Post Moderation control:
All posts from anyone using this permission who can post will immediately show up in the forum without moderation.
All posts from anyone using this permissions who can post will require moderation and will not show up in the forum until approved.
This will require the first post from anyone using this permission to be moderated before it will show up in the forum. Subsequent posts from this User will not require moderation.