extban for matching a mask only when unidentified

[jesopo]

consider a format like

$e:nick!user@host#account#gecos

and consider, e.g., 0 to mean "no account", you can ban unidentified irccloud users with

/mode +b $e:*!*@gateway/web/irccloud.com/*#0#*

or consider a format like

$u:nick!user@host

where $u: means "match unregistered users only", you can ban unidentified irccloud users with

$u:*!*@gateway/web/irccloud.com/*