Yes you do. To work with and keep any venomous reptile you need 1000 hours of training with a licensed individual per family. So you would need 1000 hours for elapids, another 1000 hours for crotalids, another 1000 hours for Helodermatidae (which will be the lizards) etc. However most mentors will sign you off on all those at once if they have the animals on their property without making you do 3000 separate hours.
Also the only lizards that I believe are covered by this at the moment is gilas and beadeds. These are the only truly venomous lizards that science is aware of although emerging evidence suggests that some monitors are venomous