Having a lid on the pot is what keeps condensation in and drips back into what you have in the pot. That's why you leave the lid on. In fact the inside of the lids of many dutch ovens are textured for specifically that reason - to control the way the condensation drips back into what you are cooking, instead of running down the sides.
If you want to cook something down and the water to evaporate, you should cook with the lid off. That is the point.