The documentation for the commandline interface says the following:
To bind a port of the container to a specific interface of the host system, use the
This is an undocumented feature. I found my answer on the mailing list:
When creating the container you have to set ExposedPorts:
"ExposedPorts": { "22/tcp": {} }
When starting your container you need to set PortBindings:
"PortBindings": { "22/tcp": [{ "HostPort": "11022" }] }
There already is an issue on github about this.