Gozzzz - A lock request for the thread would need to come from the author. If the JMod on that thread felt the thread should have been closed with their post, then they would have done so.
As the thread resides right now, it isn't breaking forum rules and will remain.
@ Al Ahmed Ali - This is the correct place to request that. However, you need to tell us which thread (give us the Quick Find Code for the thread) and what you want the new title to be.