A woman who leads a men's rights group says some mums lie about domestic violence attacks to game Australia's family courts system.

Men's Rights Agency founder Sue Price has told a federal inquiry on family law fathers are suffering in and outside court because of the lies some women tell.

The inquiry was told by the leader of a men's rights group it was a "known fact" some women lie to secure domestic violence orders. Credit:Fairfax Photographic

"Society in general has been subject to a hate campaign led by determined groups of women focusing on removing fathers from their children," Ms Price has told the inquiry in Brisbane.

"When you have people telling lies on the basis of really non-essential issues, you're using up the facilities, you're using up the money, you're using up everything which really should be given to the people who are genuinely victims of domestic violence."