Test and production system for the publishing engine

[susannecm]

Hi everyone,
we would like to use the publishing engine to create content for a test and a production system. We have a custom application that calls the engine and routes the generated output to the respective target system, depending on the user account that called our application.
Currently, we can either write to test or to production because of conflicts with the /tmp/chemistry-temp directory, which can only be used by the account that created it in the first place. We would need to delete this directory when we change this account. Is there a way to configure two tmp directories?
Thank you for your help
Susanne