Is there any plugin that records all names and ips of everyone who enters the server? And show a warning to operator of who is using more than a nick under the same ip? Like this: Herpinaldo entered the server Ip: 111111111111 Nicks known: Derp, gerp, MERP, etc.
I recently created a plugin that records, shows current ip, lists all the ips one account logged in from, compares an ip to account that have logged in to the server, warns ops if a person enters with 2 accounts on the same ip and limits the number of accounts that can log in from the same ip. This plugin can do what you want, which is the warning, or you could just limit the number of people that can log in from the same ip. Here's the link http://dev.bukkit.org/server-mods/ipcompare/
