As Beppe said, It just uses the latest UV tag, and overwrite previous tags's uv.
Actually the renderer has maximum 3-uv sets and plugin designed to work with one before this feature came up. And 2. and 3. sets are reserved for different usages.

Does that mean multiple UVs will not be supported ...

I think you need to export to Standalone, since C4D itself does not handle different UV sets.
ciao Beppe

Hi Beppe, thank you for the Reply. It is not possible to export to Standalone. It is a heavy Hairsimulation using Ornatrix Plugin. I dont understand what you mean with "C4D does not handle ...

Hello,
I have a big Problem rendering a Fur Character with Feathers. I have created the Feathers with Ornatrix where you can set different UV projections for each Feather/Hair.
Now i need to use one UV set for the Feather Alpha and the other UVset for the overall Feather Color. But the Octane UV ...