Support persons in Microsoft Planner?

Hello all,

I hope someone can help me. 

Up to now I found no solution in Planner to separate the task owner from supporting persons.

All the persons I would like to involve into a task are in the same category as the task owner itself.

For my understand it is very important to have a clear difference. Who is the owner of a task and who is supporting the task owner or is only a stakeholder at this task to get information about the progress.

thanks for your support.

regards

Wolfgang