@fran: if I install 2x MT4 on my Linux wine environment, create an account.csv with 2 separate MT4 brokers each using an individual copy of the ZorroMT4.dll inside the plugin directory (and an individual Assets.csv) and start 2 Zorro instances, one with account/broker A and one with account/broker B and let them trade they get mixed up completely. It seems they cannot distinguish between the individual DLLs for MT4. On Windows this setup works without problems so far. If you would like to try it out, I would be curious if this is the case with your system too.