Can RMNET routines be used in a thread?

Hi all.

We will be interacting with electronic labels, and the API is a bunch of restful web services, so we'll be using the RMNET routines.  I know the C$SOCKET functions are not "thread safe" because if you wait for a response, all threads will block (my manual tells me so!) but I was wondering about the RMNET routines.  Do they have the same limitation or can I launch a thread to do the API transaction, while the main function continues on?  The manual doesn't mention either way.