If you are long carry trade via short yen with everyone else, then offsetting with long CHF won't protect you.
If you are long CHF/JPY, adding GBP/AUD -- long or short, in any ratio -- is most certainly not a hedge. I'd suggest that you read up on the concept of statistical correlation. Then study correlations among the various currency pairs. Look at mataf.net or run your own in Excel.
However it plays out in relation to a carry trade liquidation, you are certainly not "hedged" against the dollar.