When I go to create a new usergroup promotion here:
Have a criteria option that allows me to select a specific Thread Prefix that I had made (that is available) and specific the node ID to the Thread Prefix like how you can specify the thread Id here:
So basically, where it shows "0" it would be a list and/or a drop down list of all the created thread prefixes and then I can assign the Node ID with that prefix or vica-versa to. Then when a specific thread select that prefix to that specific node ID the user will get rank up with this promotion.