I added an account to manage project other than current within same organization. Below is the command.
sudo hal config provider google account add gcp-spinnaker-dev --regions us-east1 --project the-dev --json-path ~/.gcp/gcp-spinnaker-dev.json
In Deploy stage I am trying to add a server group where I can see account and the region but network and subnet of respective project is not visible. It was visible with default account added through Google Click to Deploy for Spinnaker. Looks like something is wrong with above command.