Hello, esxi1979-
I believe that you are talking about getting the NFS server address -- the address of the RemoteHost for the NFS server. If so, you can get that via the RemoteHost property of the returned datastore objects. Like:
Get-Datastore | Where {$_.Type -eq"NFS"} | Select Name, FreeSpaceGB, CapacityGB, RemoteHost, RemotePath
How does that do for you?