maybe the two chars are not the same anyway. - after all... there are plenty "john smith" around - and not all of them are clones.
secondly:
an order agent who disguises as a zoner to reach places an order char is not able to .... acts as a zoner for that time.
when he gets home to - lets say... toledo. and gets out of his zoner ship - and strips his zoner disguise off. he goes to his order superiors and reports as an order agent.
as an order agent, he can also participate in assaults only available to the order, but he must not disguise himself as a zoner and participate.
thirdly: ( and thats one of the big problems of many players of disco )
good RP would demand that this cross connection is a transparent one. we know exactly when he is acting as an order agent and when he is acting as a zoner agent. - to make it QUALITY roleplay and also FAIR ( non-metagaming ) this player would state ooc that he is now in zoner disguise as an order agent - so that fellow zoner players act accordingly.
provided that the zoner players don t metagame that fact - and treat him like a zoner ( as do others ) - this RP becomes a massive opportunity.
if however someone in the big chain of players / characters involved decides to take an unfair advantage - the entire chain breaks - and the roleplay tumbles from an opportunity to metagaming.
what it takes is responsibility from all players involved, even one in the chain can ruin the entire roleplay - but if we cannot trust other players at all - there s hardly a point to roleplay anymore.
keep in mind - when you roleplay, you roleplay "together" no matter if you roleplay enemies. if you roleplayed "competatively / against each other" it is called pvp.