Regarding renewal of my passport, I am currently residing in?
You can game the system by applying for a renewal from Mumbai PSK, but I would not suggest that. You will have to provide a POA from Bengluru and bear with the Police Verification process too. Also you should be aware of the different types of penalties that the RPO can impose on you under the Passport Act. Ignorance is not an excuse. PENALTY FOR OFFENCES UNDER PASSPORT ACT, 1967