Yes, you can spool fax jobs through an AppleShare Print Server just as you spool other print jobs. However, when Choosing an AppleShare Print Server as the "target" instead of the printer, you'll need to manually select the PPD:
1) Open the Chooser
2) Select the target server
3) Select "Setup"
4) Choose "Select PPD"
5) Select the LaserWriter 16/600 PS Fax PPD
You have to manually select the PPD because queries to the printer don't get routed through the spooler. Because of this, the print driver doesn't know what type of printer the job is sent to unless you manually select the printer.
Note: You must use the LaserWriter 8.2f driver. You cannot use any non-f version of the LaserWriter driver (including any version later than LaserWriter 8.4.x)