I currently have a project where my users can upload comments/questions, but i do not want a user to see another user's suggestion.
We have a "Helpdesk" forum type. Users can leave messages, but can't see each other messages.
You can use your default forum just for some your information/announcements (leave just "News" feedback type in this forum). And show button to leave message to "helpdesk" forum for all users.
If it is a good idea for you and you need some help from us, write your comment here.