If you want to print on a remote printer, you need to run the QNX Neutrino network manager, io-pkt*. This manager loads shared objects (DLLs) to provide the protocols and device drivers needed.
For example, to load the TCP/IP stack and a device driver suitable for Ethernet adapters compatible with NE-2000, devn-ne2000.so, start io-pkt* like this:
io-pkt-v4 -dne2000