Yes, you can! You can choose to show an email address for contact reasons that does not coincide with the one you registered when creating the account.
The email address you used for registration purposes is part of the private information and you need it to log in. In case you want to change it, please follow these instructions.
On the other hand, the contact email address is public information that, if you choose to show it, shows up on your profile for other photographers to contact you if wanted.