No, the forum system has no "follow" feature. It would be useful since there are a number of helpful, well-informed forum members worth following.
One workaround you could use is to create web browser bookmarks (favorites) of the form
where NNN is a user's member number. You can see someone's member number by clicking on their name and looking at the end of the URL of their profile page.
For example, your profile page is
so the bookmark
will retrieve your posts, with the most recent posts first. This won't alert you to their new posts, but it'll make it easy for you to check for their most recent posts now and then.