Dear Nilesh,
PCC is issued from passport office not from police station. Police station falling within your current residence just needs to be mentioned in your PCC application so that police verification can be done by that police station. Dont panic, changes in addresses are just required to be mentioned in your application form and it won't create any problem for you. The PCC certificate doesn't mention your addresses it just says that "there is no criminal record and the person is eligible for emigrating to Canada". Nowdays all police stations are connected through network so it is the responsibility of your current police station to check your criminal records with all the other police stations in Gujarat. So u just don't worry.