Actually, there is a comprehensive networking and collaborative side to this WebApp, and those clients selecting to use the app with no network simply loose out on that feature. However, it's fully available within Intranets. Plus, mobile workstations can operate without any connection and then collaborate filly and securely when a connection is established.
I'm somewhat amused by how much people have read into my situation from the scant info I've offered. Simple story: limited resources, and a client that wants it everywhere, with it scaling to consume available resources if present.