We created this new feature based on GooseMoose / Orstio Shared Forum and a idea/code of ahrasis.
What is SubForum and what can it do for you?
If you have a large forum with many categories and board, this feature can help you, to split all the boards into smaller pieces. The splitting is based on the categories, so you can set a number of categories for one Subforum. In the Subforum you see (and can work) only with the boards and topics in the categories, they you have assigned to the subforum. All SMF internal functions like unread topics, search and much more worked only on the boards you can see. Any attempt to read a topic outside the subforum, ends in message, that you not have access to this. We plans to add access rights for any Subforum, to control which member group can access it.
How it works and what you have to do?
Subforum work with a domain alias like subforum.domain.tld. To use this, you have to create the domain alias you will use and then setup your Subforums (assign the categories).
For now, we have created three Subforum here. You find the switching block on the left side (Subforums) under the User block.
We hope, that this great feature is welcome for all the PortaMx admins and user.