Isn’t that a job level setting ?
I tried again following the step by step described here: https://docs.bmc.com/docs/display/public/bsadoc/Example%3A+Creating+a+VMware+Virtual+Guest+Package
But there is no "Guest Network" tab.
Also checked this page https://docs.bmc.com/docs/display/public/bsadoc/Editing+a+Virtual+Guest+Package
I don't see "IP Configuration", nor DNS Configuration when creating the VGP.
Creating the VGJ based on this, does not allow to change the Network configuration and it sets by default DHCP for IPv4 and IPv6.