[cups] Displaying job sender name on printer

[Fabrice Delente]

I have found these comments in the PPD file for the printer:

*% If the dscInfo dictionary is not set using the printer driver, the
*% userlogin and job name are set to "CUPS User" and "CUPS Application"
*% respectively. If the dscinfo dictionary is set, document name and
*% user name are set as per the CUPS login name and Document name.

Is there a way to set this dscInfo dictionary on the command line,
with lpoptions or a PS file injected into CUPS (but this, I don't know
how yet :^) ?