Yes you can and this is best done when you are repotting. If you have multiple plants in the same pot, all you have to do is simply divide your plant at the roots into as many segments as you wish and pot each of them up separately. Tease the plants gently apart at the root system, or if your plant is particularly root-bound, you can even take a sharp, sterilized knife or pruning shears and cut through the root ball to divide your plants.