Yes, it is possible for apartment maintenance or building management to shut off the power supply to a specific appliance, such as a dishwasher, while keeping the rest of the electrical system operational. This can be done by either turning off the circuit breaker that supplies power to the dishwasher or by using a dedicated shutoff switch for the dishwasher.
If your kitchen sink is still running water and other electrical appliances are functioning normally, it suggests that the issue may be specific to the dishwasher itself rather than a general power outage. There could be various reasons for the dishwasher suddenly stopping without any noise or indication of a problem. Some potential causes include a tripped circuit breaker, a faulty power connection, a malfunctioning control panel, or a problem with the dishwasher's internal components.
In this situation, it would be best to contact your apartment maintenance or building management to report the issue. They can assess the problem and arrange for a technician to inspect and repair the dishwasher if necessary.