I have members who post in one specific section more than others, is there a way to lets say block them out of that section unless they post a certain number of posts elsewhere?
You can use the user promotion system for that. Create a user group that duplicates your Registered user group. We'll call it Premiums. Revoke access to said section on the Registered user group. Grant access to said section on the Premiums user group. Set up a promotion so that when users post X messages, they are automatically added to the Premiums user group.
I don't think this is what the OP wants. This will only prevent users accessing the forum until they've made X posts, after which they can post in the forum as often as they like. I believe the OP wants them to make X posts in other forums, then post in this forum, then make another X posts in other forums before posting in the forum again and so on. If this is the case then @Mike Edge is correct and an add-on is required.
