Added in 4.4
on <level>:CHGIAL:<nick[,nick]>|<*>:<commands>
Triggers when a user hostname, ident, realname, account name, away status or bot mode is changed.
See also /ial, /ialfill, /ialmark, $ial.
Parameters
<level> - The User Access Level for the event to trigger.
<nick[,nick]>|<*> - Nicks(s) to listen to.
<commands> - The commands to be performed when the event listener's criteria is met.
Example
on *:CHGIAL:*:echo -ag IAL for $nick changed to $ial($nick)