When multiple OMCSessionZMQ objects are created on a single machine, do these session instances all communicate to the same modelica compiler; or is each instance communicating with its own compiler?

I ask because I am wanting to run in parallel many tasks:

1. Create OMCSessionZMQ instance and load a model
2. Manipulate the model: change component names, alter connections
3. Dump model to XML
4. Perform analysis on XML with another tool

The question is if I have multiple Python interpreters working through those steps in parallel, do we get a fresh unaltered model each time we load it? Or do we get a model that has been manipulated by another session?