A paper type dedicated for use only with jobs matching specifically designated
criteria, such as a specific client and a specific job, is loaded into a network
printer. Jobs not matching specifically designated criteria, such as jobs from
non-designated clients or for non-designated jobs, are not printed out onto the
specially loaded paper type. A user designates the client or job through a designating
unit (3) inside the network printer (2). After designation, the client
such as a personal computer generates a printing request, which is sent over the
network (1) and received by the network printer (2). Upon reception,
the printing unit (4) determines whether or not the received request matches
the designating criteria. The printing unit (4) prints out only those jobs,
which match the designating criteria.