We currently have a similar functionality that might help you keep track of forum posts easier. In your Client.net home page you can see a "My Forum Posts" module that displays all threads for which you have subscribed - each thread has a "new mail" icon if it has posts that you haven't read. The threads are ordered by latest post, so you may have at your fingertips only those threads that interest you and that have had recent activity. Additionally, if you are logged in with your Client.net account, when you browse a forum, next to each thread the same "new mail" icon will prompt an unread post.
Because of the huge activity of our community forums, we believe that it will not be helpful to display all threads with posts you have not read since your last visit. Alternatively, you can simply press the search button with an empty search - this will display as search results all forum posts sorted, latest on top.
Please, get back to us these options are not what you are looking for or if you have other ideas for making our forums a better stop - we value your feedback highly and would like to thank you for taking the time to write.
Have a nice day,