There is a hot-shoe located on the top of the LomoKino. The hot-shoe works with all kinds of electronic flashes. However many electronic flashes may not be able to recharge as fast as you can shoot.
Here are a couple of tips for using a flash with the LomoKino:
Use a high-end flash product to achieve a short recharging time e.g. the Lomography Fritz the Blitz flash is able to recharge within a second at a 1/8 output mode.
Use the flash to make stop motion photos: take each frame one by one until your flash is recharged.