Nearly every HVAC system incorporats a return-air vent. As long as the air-circulation fan(s) runs occasionally, the waste heat from any appliances, people, cooking, etc, will be spread evenly throughout the structure. Engineers design with heat-loads in the calculations.

So as long as your thermostat isn't located in the 'hot' room (apparently your computer-bedroom) if the heat only kicks-on once an hour, there should be a return air somewhere near-enough to your bedroom to suck-that heat out and spread it around the house.

Now if you mean that you want a system to monitor each room's heat and individually control heating vents and return air flow, again, that's possible, but mostly not worth the trouble and cost that a complex control system would cost.

Also, if you haven't trapped your PC it in a desk or enclosure that compromises air circulation, there is almost no risk of it catching fire. PC's have UL/CE/CSA certification, so the manufacturer already had to prove it was not a fire hazard. But yes, a normal desktop can use hundreds of watts of electricity, which becomes heat in your bedroom. Bad for those AC days.