Get-VM | Get-NetworkAdapter | Select-Object -Property Parent, NetworkName | group-object -Property Parent | %{" ", $_.Group}
Parent NetworkName
------ -----------
VM-Name-1 111-ADM-A1
VM-Name-1 123-Sync-S4
VM-Name-2 111-ADM-A1
VM-Name-2 456-Mgmt_Srv-01
VM-Name-3 111-ADM-A1
VM-Name-3 321-;g,t_Srv-05
...