...or if he's essentially off the hook.
He remains "on the hook".
By breaching the terms of his order, he's looking at two things.
Breaching the order can be a new, separate offence.
Separately, and in addition, he faces the prospect of a revised sentence
on the thing he got the CCO for in the first place.
And yes, he can be arrested for either or both offences in WA, or anywhere else in Australia.
So is a person on a community based order essentially a prisoner in the community?
Pretty much, yes.
Don't confuse it with a bond, which doesn't always involve a conviction.
I'm just a bit confused by the "escapee" comment, seems from what I've read it will greatly depend on whether Victoria issues an extradition order or whatever it's called, so seems it could go either way.
He's a sentenced prisoner. The difference is that he's in the community, rather than behind the wire.
Further, it is very often - even usually - a condition in Victoria
that the person stays within the state for the duration
(unless they get formal permission to leave).
In effect, his prison wall is the state border, not some wire fence.
If he leaves, he's escaping.