Hi,
If multiple IP addresses had been assigned to a vm, guest.ipAddress or summary.guest.ipAddress will return the primary IP address assigned to the guest operating system.
Other way to get the list of all IP address of a vm by using guest.net which returns array of GuestNicInfo, holding guest information about the network adapters.ipAddress property returns the IP addresses of the adapter.
I hope it helps you.
Thanks
Niket