Is this a theoretical or an actual thing? ..... If it's an actual thing, is it an AVDO (domestic violence order)?
Making assumptions cause the facts aren't known, if it's the later, & if the PINOP overseas is an Oz citizen & the respondent is residing in NSW, then the PINOP could apply by electronic means for an interim order ... If accepted & the respondent is served, job done ..... From what I'm hearing of late the FIRST mention can be anywhere from 3 -7 months away.. The PINOP is not required to attend the first mention, so you would be looking at months more before an actual trial date, that's if the applicant doesn't adjourn.
At trial, the applicant could choose to be represented by a lawyer or in some circumstances, appear by video link.