PPL is restricted to day operations and I was wondering if anyone has been able to obtain instructor rating with similar problem?
Why have you got that? Presumably if you get a CIR or NVFR it gets removed in Australia?
I know a guy who has Restriction No 13 on his Class 1 medical certificate, which states 'Holder does not fully meet requirements of ICAO Convention Chapter 6 of Annex 1'. That apparently means the Med Cert is only valid in Australia. He has the 'usual' red/green colour deficiency but has current CPL, CIR and Instructor Rating. So the Answer is 'yes' it can be done, but probably only in Australia. Same guy also hs a JAA PPL, which is restricted to day VFR only and cannot be extended beyond that. Some of us have an enormous debt to Arthur Pape and the AAT!