hmmmm... not easily. You could make a special template for that forum to strip all extraneous html from each post so they look like they are one post, or allow people to edit each other's posts.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.