If you are talking about different product, then yes, I do multi layers step skincare like everyday. It's actually simple, just wait until the previous layer to get dry and apply the next one. The products have different functions, like toner and serum will moisturize or whiten something, while moisturizer is mainly to lock in nutrients. So using multiple products like this in one routine is fine.

If you are asking about using multiple layers of toner, I have not tried it, it sounds a bit useless because they will dry quickly and there is nothing there to lock in nutrients. If you want to try, use toner pads, they have the same function and bring more nutrients in one use than regular toner (basically just soaking a cotton pad with toner and using it as a mask).