Yes, in HotDoodle, we call discussion forums Bulletin Boards. Only registered users that subscribe to the Bulletin Board are able to participate in a discussion forum on a HotDoodle website. To gain registered users on your website, you will have to add the Login/Registration block or manually enter all the users from a separate user/member list you may already have.
In order to use the functionality of the Bulletin Boards block for discussion forums, your website must be on the Dynamic monthly hosting plan.
To learn more about the HotDoodle Bulletin Boards block, click here.