*** KLINE Command ***
"Bans" a hostmask from connection to the IRC server.
The user can however connect to other servers on the network !!
*** ZLINE Command ***
Disables all access to the IRC server from a specified IP.
The IP can however connect to other servers on the network !!
*** GLINE command ***
This command provides timed G:Lines. If you match
a G:Line you cannot connect to ANY server on the network.
***QLINE command ***
Restricts the use of a nickname to network operators.
Used to ban inappropriate nicknames, or reserve IRCop nicks.
source: Google
Note: these are for specific networks, and may not even exist on others.