I don't know how, all I can see is their email and IP, email and Ip changes every few hours. I marked it as installed but I want something that just works, not something I have to constantly maintain.

I also don't understand how useragent blocking will block changing ip addresses. can someone please just answer my original question?

No one here is the developer of that Mod you're trying to use. Have you tried asking THAT developer? This is a site for mods designed FOR vBulletin.

The two vBulletin tools which were developed FOR vBulletin and released here, which we already linked you to, are very handy anti-spam tools. They require no maintenance, they just simply, work.

User Agents: Simon has a very good and informative article on those, and you find them by analyzing the online.php page where you see the IP addresses of all guests online, at the bottom of that page are options for viewing the User Agent string of the spammers. The UA string is independent of the IP addresses, it identifies the device used to access your site.

In Simon's signature is a link to a good, comprehensive list of spammer and other bad actor UA strings you can copy and paste into his Mod. You'll be amazed at what all it stops.

If you insist on using the mod you mention in the OP, you might have better luck posting your request in the paid services section of vb dot org. Some coder might take you up on the job.

If you want help with my mod(s) then pm me an i'll set them up for you.