A client wants to setup two separate SuperContainer servers for their two offices. From the user's point of view, one server will be on the LAN with a local IP address and the other will be on the WAN. How can I access a document from either server with the save Webview?

Are you trying to host the same files on both servers? You local users could still use the public IP and continue to get the benefits of their local network.

Keep in mind that you will need to purchase two different license keys in order to run two deployments of SuperContainer Server.

If you wanted to run two different servers you could perform a case calculation using the get(hostIP) function in your web viewer see how the users are connected and then to determine which SuperConainer server to connect to. However, I would not recommend doing this if you are trying to keep the same files on each server, as you will need to keep the two servers in sync, which could be troublesome. It is a much cleaner solution to use a single SuperContainer Server.