Yes, a punter is some-one who punts the bakk (e.g., for an extra point after goal
In the context given above, the meaning would be from horse and dog racing slang:
Punt - Another term for bet or wager.
Punter - Bettor or investor. http://www.ildado.com/horse_racing_glossary02.html
How-ever, there is another slang meaning of the word that has come into frequnecy
in the last score years. I am not sure what it is though: Biedermann, Schlucker,
Schlemiel, Joe Sixpack?? Perhaps it is the same as the London and NZ slang:
... porky pies - Rhyming Slang for 'lies'. ... Originates from the Hindi word 'pakka'
meaning 'substantial'. ... punter - the paying public, a customer. ...