You can ban IP ranges in Threads7 just by entering:

Class C: 0.0.0.%
Class B: 0.0.%
Class A: 0.%

Also, this topic is now two years old, something tells me they found a solution since they never replied.

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
Do you need Forum Install or Upgrade Services?
Forums: A Gardeners Forum
UBB.threads: UBBWiki, UBB Styles, UBB.Sitemaps
Longtime Supporter & Resident Post-A-Holic
VNC Web Services: Code Modifications, Upgrades, Styling, Coding Services, Disaster Recovery, and more!