Here are a few reasonable answers from that link.
You can check livedata base on plants too um in the "resources" tab
DGray said: VFTs are poisonous and should not be put in animal environments.
I have a very good library of books on carnivorous plants and some experience; if you need references or more care info, PM me
james L said: I think a venus is fine. I doubt its toxic enough to do any harm but why put it in a cham cage. Maybe a pygmy, but not something like a panther or any thing as large. Dgray for future note ive used carnivorous plants in vivariums before and never had issues with any animals because of the plants. The plants dont always live long but there safe in opinion. you over worry about plants. Do some experimenting
spearsre said: I think possibly someone has answered your question already. I have grown carnivorous plants for a long time. While there are some Asian pitcher plants that can trap small rodents, amphibians, and reptiles, there is no way a Venus' fly trap can handle a Chameleon. If you find one then please let me know.
It is more likely your Venus fly trap will die in the cage with the chameleon due to it's need for light, 80 percent humidity, and proper soil mixtures (sand and peat). I would recommend to any person interested in carnivorous plants to visit Cascade Carnivores and any of the other number of carnivorous plant dealers out there. Asian Pitcher plants could make good terrerium type plants but those are not the best places to keep chameleons. Anyway, feel free to PM me if you have other questions. Good luck and have no fear of placing a VFT with your cham.
I hoped these help..from what I seen I wouldn't do it just because the environment of the habitat. Good luck