You would need to have a print server running on Windows for AIX to send to, normally listening on TCP port 515. You can then define a remote printer to AIX and it should talk using the lpd protocol.
For a print server, we had a need to convert Xerox Escape Sequence (XES) formatted data (a rather old application generated the print file) and we have no printers that recognise XES any more. Our are PCL or occasionally PostScript. We found a German company that provided just what we needed and they are pretty cheap too.
Start page - docuFORM GmbH
I hope I'm not breaching the advertising rules, but it is as a customer.
It allowed us to convert characters that had been hard-coded into the application that the old Xerox printers used that were non-standard for the current devices too. You may also consider MPI Tech, IHS Systems and others, but this is the one we settled on.
If you data requires no conversion, then that's fine too.
Robin