As of April, 1995 there is no workaround for this. The Macintosh LaserWriter driver looks for the computer name in the AppleShare name field from the Sharing Setup control panel, and puts it into the PostScript job in a field called %%FOR. The AppleShare Print Server reads this field and reports it in the log when a file is spooled.
The PostScript output from the DOS Compatibility card does not have the %%FOR field therefore, the print spooler has no name to report.