The law, which makes film workers independent contractors by default, has not protected Kiwi jobs and skills, she said.
"If there's jobs created from the special deals we've done, then New Zealanders should be lined up to do them.
"While we all celebrate the success of our film industry, it would be so much better if we were also able to celebrate the growth of home-grown, highly-skilled technical jobs as well.
"We want to see Kiwi camera operators, Kiwi software developers, Kiwi technicians, not just Kiwi 'extras'."
Ms Fenton said Government should invest more in training highly skilled New Zealand film workers to ensure companies like Weta did not have to look overseas for expertise.
"These are the kind of highly skilled, well-paying jobs that our economy needs, and we owe it to New Zealanders to do everything we can to ensure they have the first opportunity to take up these roles."
A Weta Digital spokeswoman said the company was not issuing a response to Ms Fenton's statements.