Is it possible to configure dispatcher to send requests from one user to same publisher instance (publishers are load balanced).
Its kind of implementing stickly sessions for publisher instances (on top of WebServers)
Please check the docs, espcially http://dev.day.com/docs/en/cq/current/deploying/dispatcher/disp_config.html#par_175_73_001 2 sounds interesting for your case.
I am assuming your set up is  then you need to configure load balancer for sticky connection. In case it is like  then JÖrg suggestion should work.
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