A system for creating one or more group networks between network devices belonging to one or more local networks. Group network devices, dynamically installed at the local networks, are employed to discover network devices connected to their corresponding local networks. Information indicative of a plurality of network devices discovered by the group network devices or selected by a user from amongst the discovered network devices for creation of a group network is received. The plurality of network devices are assigned to the group network, and defined as members of the group network. The group network devices are employed to automatically perform network configurations for the plurality of network devices, regardless of whether the members of the group network are connected to a same physical local network or to different geographically-separated physical local networks. The group network so created enables the members of the group network to communicate and interoperate with each other in their native protocols. The given group network supports different types of transmission paths and/or different transmission protocols defined by the transmission paths.