I found a history feature request from a few years ago: #3096.

afaik this is not supported, at least yet.

this feature is really needed

contributions to the codebase are welcome :) I would also appreciate a remote-worker like this, but this is a complex topic I think.

i think this is not very complex, we can use multy rabbitmq queue to do this. action or workflow add a queue name as param(emply will use default queue), then the scheduler send this task to specific queue. st2actionrunner accpet a queue name param, to process default queue and paramed queue.