docker container options with platform directive?

[smaring]

We use self-hosted runners within our organization to interact with on-prem Artifactory and Sonar instances. In order to access these instances we must connect to the corporate network via VPN. My desktop/workstation is native Ubuntu. By default, the Docker networking is "bridged". I am unable to get network traffic to go out the VPN unless I start Docker containers with "host" networking. There doesn't seem to be a way to change the default networking so that you don't have to override it when starting a container. With nektos/act I can specify the image I want it to use, but is there a way to specify any further options like networking?

act push \
	--workflows .github/workflows/merge-to-master.yml \
	--secret     MY_SECRET=****** \
	--platform   self-hosted=my-docker-image

[KnisterPeter]

I think you can use latest master version with this feature: #1462
It's not yet documented on the README.