I'll break it down by genus for you,
Dionaea: muscipula (much hardier than you'd expect. Mine have frozen several times before and survived.)
Drosera: Tropical- capensis, adelae, spatulata, aliciae, venusta, binata
Temperate- intermedia, capillaris
Nepenthes: x ventrata, ventricosa, Miranda, smilesii, aristolochioides x thorelii
Sarracenia: purpurea, flava
Pinguicula: primuliflora, moranensis
Utricularia: gibba, livida, bisquimata, sandersonii
A note on the Sarracenia I recommended, they can handle temperatures much colder than most would expect. The last remaining S. flava site in Virginia may be very close to the NC border, but it's one of the coldest spot in VA during the winter. Nights regularly dip below freezing by quite a bit. I talking below 0 F!