Magic Tricks

sure!

While it's meant for US currency, as long as the bills are opaque and you're willing to be creative, I don't see why you couldn't!

Not really answering the question but just adding more detail to the question:
Australian banknotes are made from polymer film (ie plastic), each note has a small clear window. The different value notes are the same width but different lengths; also, each note is a different color. Eg A$5 is purple and ~4mm shorter than an A$10 which is blue.
The UK, Canada, and many other countries have adopted the Australian technology; paper banknotes are on the way out and many money tricks relying on foldable paper are not transferable.
Polymer banknotes are hard to fold and won't hold a fold.
I am not sure about this trick, I would love to know.

Adding to previous answers, the bills should also be similarly sized otherwise the folding part might be a bit hard to pull off.