Bradley Lester Grey, 53, was already facing 10 charges of human trafficking, forced labour, breaking immigration law, rape and committing an indecency.

On Thursday, Mr Grey appeared in the ACT Magistrates Court for a third time, where he was charged with a further 15 counts, including rape, attempted rape, trafficking a child for sexual services, and producing child porn.

He is yet to enter pleas to the allegations.

The fresh charges relate to three alleged victims, while the previous charges relate to another three women.

Facts were not tendered in court on Thursday, however, the new charges cover a four year period between 2013 and 2017.

The court heard the child, aged under 18, had allegedly been trafficked between Queensland, NSW, the ACT, and Adelaide in 2013.

Mr Grey also allegedly used the girl to produce child pornography during that period.

Mr Grey was arrested in February during a raid on an Auburn brothel after a six month joint ACT and NSW police investigation into allegations of forced labour and human trafficking.

He was extradited from Sydney to Canberra charged with human trafficking, forced labour and breaking immigration law, as well as raping and committing an indecent act on the woman it's alleged he trafficked into Australia for sex work.

In March, he was charged with discouraging the use of prophylactics and further rape and act of indecency charges against a further two alleged victims.

Mr Grey remains in custody and the matter was adjourned to reappear next month.