How do you wire 4 different switches to one power source?

At least two different methods. One is to run power from panel to one light, then to the next, then next, then next. Run separate cable from each light to the switch location where you want the control.

Other way is to run power from panel (hot, neutral and ground) to first switch box, then an identical cable to the light #1, contine always hot wire from switch box 1 to switch box 2, then identical cable to light 2, repeat 2 moe times.

If you are talking about 4 switches in one box, use pigtails from incoming (from panel) hot to each switch--then apply that concept to the options listed above for switches in different locations. Watch and anticipate/plan how many conductors will be in each box and check code for maximum wires in various size boxes.