Multi-User & parallel & Dynamic workflow in Django

I'm looking for the best solution for the development of workflow engine in Django (Django-Rest-Framework) by this requirement :

• permission checking/task assignment options
• Parallel workflows allow to have several active tasks at once and probably have some sort of parallel sync/join functionality
• dynamic workflows typically could be configuring by changing the contents of workflow database tables

The approach I found:

• one approach is BPMN engines, and use the SpiffWorkflow package(which is python pure not Django)
• one other approach is to use camunda API (can create limitations)
• or use Django-based workflows packages that I did not find a package that supports Multi-user(permission) & Parallel & Dynamic workflows

What is the best solution for this problem?

I solved this problem by django goflow package (github). this package supports :

• permission checking by user Group
• task assignment to specific user or a group (push and pull strategeis)
• dynamic design allow changes in workflow steps, transitions, permissions ,...
• Exclusive gateway (xor gateway) and Parallel gateway (and gateway)
• Any type of events (Message, Timer, Error, ...)