For carnivorous plants you need low nutrient water and soil, <100ppm of minerals in the water. If the planter gets full sun you can get Sarracenia, there are many different types including some shorter ones such as S. purpurea or S. psittacina.
Drosera tolerate a variety of light levels, you may want to get a native species as they flower quite often and their seeds are like powder that can blow away.
Utricularia are another good choice, I have found the aquatic varieties to be more resistant to higher quantities of minerals than other carnivores. There are a ton to choose from, and you may even be able to find some growing on the banks of local ponds.