Another example: you have a printer, a printer server, and N clients connected to the server. You send a capability to the clients that grants them usage of the

Another example: you have a printer, a printer server, and N clients connected to the server. You send a capability to the clients that grants them usage of the printer. That capability allows them to print at certain time in black and white only, but the marketing department gets a capability that allows them to print in color. Your customer comes to the office comes and wants to use the printer while he’s there, so you use your capability to send them a capability that will give them access to the printer (b/w only still, they can’t get color because you can’t get color) for an hour. However their capability is restricted such that they will not be able to grant anyone else access to the printer