unrealircd_mods/man/nicksuffix.md

[SPEC] nicksuffix

Requested by Celine, this module prevents people from doing /nick <anything here>. Rather, it suffixes the "original" nick (the one on connect) with what the user specifies. There's also a special "nick" to revert back to the original one. ;] The module also comes with a new config block, which is required.

Config block:

nicksuffix {
    separator "|";
    restore "me";
init-on-load 1;
};

The separator can be one of the following characters: -_[]{}\|
The restore text is so when people do /nick me they'll revert back to what they had on connect. It can be anything you want, as long as Unreal sees it as a valid nick.
The init-on-load option is to store the nicknames of all currently connected users when the module (re)loads, if nothing has been stored yet.

Also, keep in mind that the specified separator char cannot be used for "base" nicknames, so connecting to IRC with a nick such as foo|bar is not possible.