Class JobOriginatingUserName is a printing attribute class, a text
attribute, that contains the name of the end user that submitted the
print job. If possible, the printer sets this attribute to the most
authenticated printable user name that it can obtain from the
authentication service that authenticated the submitted Print Request.
If such is not available, the printer uses the value of the
attribute supplied by the client in the Print Request's attribute set.
If no authentication service is available, and the client did not supply
the printer sets the JobOriginatingUserName attribute to an empty
IPP Compatibility: The string value gives the IPP name value. The
locale gives the IPP natural language. The category name returned by
getName() gives the IPP attribute name.