I had a script written for me to perform /authserv on different account while connected to the same server opening both accounts on different trees.
Since I've updated to a new version of Mirc, that script wont work.

Code:
ON *:START:{

 server irc.gamesurge.net:6667 -i Nickname Alternative 
email name
 server -mp irc.gamesurge.net:6667 -i Nickname Alternative 
email name

}

ON *:CONNECT:{
 mode $me +x

 if (*gamesurge* iswm $network && *CEVO* iswm $me) {
   as auth account password
   mode nick +x
   join #channels
 }

 if (*gamesurge* iswm $network && *fd* iswm $me) {
   as auth account password
   mode nick +x
   join #channels
 }


the *CEVO* and *fd* are tags of both accounts