here i have a script that sets the limit of the channel, now i only want to have it working on one server. i visit thes ame channel on 2 different servers. what do i use to detect the server please

I only want it to work for Undernet

#limitscript on
on *:JOIN:#beginner: {
if ( $server
if (%join.count == $null) set %join.count 1
if (%join.count < 4) { inc %join.count | halt }
if (%join.count == 4) { set %chan.limit $calc($nick(#,0) + 7) | mode # +l %chan.limit | unset %join.count }
}
on *:PART:#beginner: {
if (%part.count == $null) set %part.count 1
if (%part.count < 8) { inc %part.count | halt }
if (%part.count == 8) { set %chan.limit $calc($nick(#,0) + 7) | mode # +l %chan.limit | unset %part.count }
}
#limitscript end