The leaders said they met with Minister responsible for NZSIS Andrew Little yesterday, raising their concerns.
No formal commitment was made, but the leaders said they were pleased with the swift response and their willingness to engage.
Little told the Herald that "NZSIS is an intelligence agency, not a law enforcement agency".
"The NZSIS does not have a legal mandate to prosecute offences, unlike law enforcement agencies such as the Police."
Little said, however, that NZSIS shares information with Police in certain circumstances to support Police's law enforcement function.
Ngarewa-Packer said they are yet to meet with the Minister of Police and the Police Commissioner.
"Our own research tells us that [white supremacist] organisations are recruiting followers and becoming smarter in the ways they mobilise their platforms."
"We are acutely aware of the National Security indicators that capture specific data about white supremacists' organisations and their behaviours and nowhere are there specific indicators that capture terrorism or hate speech against Māori.
"We need to do better than that."
Race Relations Commissioner Meng Foon told the Herald he "fully supports the call for a joint taskforce".
If they'd like, he said, it can include the Race Relations Commissioner into an inquiry into white supremacist activities that are threatening to Māori.
"Racism and extremism in Aotearoa is not tolerated, it has to be stamped out."
"We really want to know from the IPCA inquiry who are the people [conducting racist hate crimes], what is their reasoning?"
"Is there a way we can help people not be extremists?"
"My door is always open and if the Māori Party need any support, we are here for them."
Waititi said it's expected for racists to come out harder now that there is a strong awareness for tangata whenua.
"This is why we believe it is the Government's responsibility to dedicate resource towards the protection of the indigenous people of their country," he said.
