"Priest was not a victim of the Ponzi scheme," Chisholm said. "There's no suggestion he was ever allocated fictional shares, he was not paid fictional profits."
Complicating matters, Ross used the same ANZ Bank current account for all transactions, meaning Priest's investments flowed through the same account as Ross's other investors.
Justice Clifford said effectively the Ponzi scheme had "muddied the waters" in terms of the cash passing through the account, and therefore the argument could be made that everything should be evenly distributed to investors.
Chisholm argued that Priest's investments were untraceable as they went through the account, meaning RAM investors can't claim his shares because they can't be singled out.
In June, liquidator Fisk won the right to claw-back cash from investors who were paid fictitious gains, although an investor's principal could be viewed separately.
Justice Alan MacKenzie ordered former Ross Asset Management investor Hamish McIntosh to repay $454,000 in fictitious gains from his investment, but he was able to keep his $500,000 principal payment.
Defrauded RAM investors expect to receive 3 cents in every dollar invested.
Fisk is seeking to claw back some of the $100 million to $115 million that was lost in the fraudulent scheme for some 1,200 investors. As at June 16, Fisk estimated the realisable value of shares held by Ross Asset Management entities to be about $5.4 million, with estimated total realisations available for investors and creditors of $3.98 million.
Ross Asset Management's assets were frozen and receivers appointed in 2012 by the Financial Markets Authority after the watchdog received complaints about delayed or non-payment of investor funds. Ross wasn't available in the early days of the investigation due to his hospitalisation under the Mental Health Act.
PwC's John Fisk and David Bridgman were appointed to preserve the assets of the Ross family and related trusts as part of the wider investigation into Ross Asset Management.
The hearing before Justice Clifford is continuing.