Ms Harvey said Ms Lorck sat in the same phone bank as Craig Foss' parents, who were also volunteering.
"She [Ms Lorck] knew what she was doing. She knew who we were and she knew what party she was supporting."
Ms Lorck has this week rejected claims that she was a National Party supporter three years ago. The claims were fanned by the emergence of a photograph of her with Prime Minister John Key in 2011.
Ms Harvey's comments came after Ms Lorck declared her election-day volunteering on Sunday.
"As I confirmed [Sunday], I spent one hour on election day at a National Party base calling offering transport to a polling both, that was not about supporting Craig Foss.
"I was happy to help to get people out to vote. I declared this in my nomination form before I stood for Labour," she said.
Ms Harvey said while parties weren't allowed to campaign on election day, volunteers at the National phone banks were supplied a list of people likely to vote National by the party's headquarters, and rang them to encourage them to vote.
"Who did she think she was calling?"
Ms Harvey, who is not a member of Mr Foss' campaign team this year, said due to Ms Lorck's help on election day 2011, she thought Ms Lorck's Labour candidacy was "a joke".
"I didn't take it very seriously at all."
Ms Lorck said she wasn't interested in "playing games" and had no further comment.
"I'm focused on what does matter; better-paying jobs, homes, health, education and regional development for Tukituki."