I have this installed and the extra IP information hack installed.
https://vborg.vbsupport.ru/showthread.php?t=96834
The extra IP information hack shows other users that have used the same IP but those users don't show up in the duplicate IP information in the admincp. Does the duplicate IP hack only check the IP that shows up under the user manager in the admincp and if so could it check all the IPs a user has used to add them to the duplicate IP address list?