"It would be improper for me to comment while the Speaker's still considering a privileges case,'' he told Newstalk ZB.
He said he would not be backing National MP Jami-Lee Ross's bill allowing employers to hire contract workers when their employees go on strike.
Mr Dunne said it was a step too far and he thought the right to strike was an important part of industrial law.
"I think this is really the Ports of Auckland Bill, frankly. And while I understand the motivation behind it, I think it's too big of a sledgehammer to deal with this specific issue.
"I think that there will be people who will misuse it, and I think that's detrimental.''
Meanwhile, the board of the Electoral Commission will meet tomorrow to consider the process for re-registration of the United Future Party.
The party was deregistered after Dunne said he could not guarantee it had 500 members.
United Future asked the commission to change its procedures and accept electronic evidence of the party's membership, rather than having to provide paper copies of membership forms.