radar o'reilly,
No. I was in the same situation last year, and my application was rejected because of this reason.
Any IFR training at all, does go against you, and basically eliminates you from running for a position.
Quote from QF website:
Are there any maximum limitations?
Yes. If you hold an Instrument Rating you will not be eligible to apply for the Qantas Cadet Pilot Training Program. Additionally, if you do not hold an Instrument Rating but have completed some or all of the practical training towards an Instrument Rating you may be at a disadvantage in the selection process. Completion of some or all of the Airline Transport Pilot (Aeroplane) Licence or Instrument Rating theory subjects will not disadvantage you in the selection process.