You would ONLY if each pronto is configured to communicate using separate IP addresses (1 IP address per zone). I highly recommend that to avoid speculation, you contact Escient directly. Unless you have 2 separate IP addresses, all bets are off.

With a single IP address, you should be able to see metadata on both remotes with limitations. If user A selects a song on Remote #1 and plays, and then user B selects a different song on Remote #2, the last person to select and play "WINS". The actions from both users affect only Zone #1.