Hello Jithkmohan,
As previously answered, the ability to practise is dependent upon that countries laws, including independent treatment. In Australia, we have the right to treat patients independently and Australia was the first place in the world that this occurred, but only after rigid educational and government controls were in place - to ensure adequate standards were maintained. You would need to check the specific requirements applicable to the country in which you wish to practise physiotherapy. You are likely to find that an exam will need to be passed if you wish to practise in a country other than the one in which you received your training.
Hope this is of benefit.
Cheers,
MrPhysio+