Hi, and welcome
You can install OctaneRender in any device you want, there is not a limit, but you can activate the Standalone and plugins license on one device at a time.
You also have 10x Render-Node licenses that can be used to speed up the rendering of the main Workstation that works with Standalone and plugins.
Basically you can use the Octane Network Render 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.
ciao,
Beppe