Im not understanding what do you mean with " only it has the detail that one will L2J L2Off and the other two ", you are not explaing nothing,
you want to run 2 l2off, 2 l2j, or 1 l2off and 1 l2j or what? and you say "one will be and the other two" so you are talking about 3 servers?
anyway, i dont think that you can ran an authd and an l2j loginserver on the same host, them should go in conflict for the IP/Port's,
either, if you can run them,i dont think that the client will work, cause he have to select on wich login he have to do the login,
in this case you have to run them on different ports, so you cannot use the same system " to show 2 servers on the login " to do so, as neyks says,
you have to add the support for the AuthD on the l2j gameserver core, other wise just run 2 l2j's or 2 l2off's with theyr right login servers.
Anyway i can be wrong...
Btw lol why you want to run an l2j + an l2off?