Noi sorry, the Render-Node license can be used only with octane Network rendering feature for adding the GPUs of the machines in your LAN to the Workstation via Ethernet in both Live View / IPR, and Picture Viewer/Render Queue final render, with animated and static scenes. So you can use its power in every phase of the scene preparation, speeding up a lot the workflow.
The secondary machine will run the Render-Node license in daemon mode, while your first machine with Enterprise license will be the Workstation, and you can add or remove the Render-Nodes from the rendering on the fly. Max 200x GPUs internal and external, depending on the network interface speed.
Studio licenses do not have the Network rendering feature, and we suggest a minimum of 1Gbit connection between Workstation and Render-Nodes, better to have 10Gbit, with complex/huge scenes.
Please, have a look at the documentation here:
Octane Network Render
If you want to use other machines with c4doctane plugin at the same time, like with Team Render feature or distributed rendering software like ThinkBox Deadline, you need a complete Enterprise license Standalone + plugin, if the machine has more than 2x GPUs, or Studio Combo license, if machine has 2x GPUs or less, for each client. But the benefits are only in final render/Picture Viewer, and the Render-Node licenses cannot be used in this case.
ciao Beppe