Ms Wong resigned from her women's affairs and ethnic affairs portfolios on Friday after admitting she misused her taxpayer funded travel subsidy by paying for her husband Sammy Wong's travel to China in late 2008 while he was conducting personal business.
Mr Hodgson said today there were two private companies registered at Ms Wong's Botany Downs electorate office, both of which are run by Mr Wong.
Company records show Mr Wong is the sole director and shareholder of Sampan Enterprises, which is listed under the address of the Botany office.
The second is Shipley and Wong, whose directors are listed as former prime minister Dame Jenny Shipley and her husband Burton, along with Mr Wong. The company's shareholders are listed as Mr Wong and Dame Jenny.
Directions by the Speaker of the House say while members of Parliament are ultimately responsible for how they use public money, expenditure must only be incurred in respect of public business, and individuals must be open about how they use public resources.
Mr Hodgson said he didn't know whether the companies traded from the office, held separate leases or shared any services, but he said it was unlikely the situation would fall within the rules.
"Nor is it known whether (Dame Jenny) is aware that one of her companies is registered at the address of Pansy Wong's electorate office.''
Dame Jenny could not be reached for comment this evening.
Prime Minister John Key, who accepted Mrs Wong's resignation last Thursday night and is now awaiting the outcome of an inquiry from Parliamentary Service to see if there was any further abuse of the travel allowance, said he knew nothing about the link between the businesses and the office.
However, he said there could be any number of explanations, including the possibility of it simply being a mailing address.
"People have mailing addresses for all sorts of reasons. Sometimes it's simply that they move houses and it's convenient to have a location they know they are going to constantly be at...you need to ask her about it''.
Mrs Wong has not fronted media since announcing her resignation and NZPA was unable to contact her today.
Mr Key said he hadn't spoken to Mrs Wong since her decision to resign, but would advise her not to answer questions about the expenses inquiry until after it had been completed and she had had a chance to reflect on it.
He said the issue involving the electorate office wouldn't come under the scope of the Parliamentary Service inquiry into her travel expenses.
