Defining private params for an included launch file with multiple namespaces

edit

Is there a way for defining private parameters for an included launch file that has multiple private namespaces? My scenario is that I have three PID modules running in parallel that uses three identical node types but with different namespaces and parameter mappings. The topic remapping arguments are in the private namespace for the nodes.

There is no mention of this situation on Roslaunch tips for larger projects.

There is mention of a similar scenario in this question.

Do I need to do something like passing topic remappings as a series of defined $(arg ...) constructs?

Thanks, Bart