No,forex and trading in international market is illegal.You can trade the account of citizen of the country.
Ask somebody who remains in foreign to open a account for you and you can trade deravatives there, and you will ask is this possible, yes why not , i am using account open by my brother living in usa and trading only cboe vix on nyse but remember account should be on that persons name who is living there
You can trade/Invest in foreign markets under the Liberalized Remittance Scheme (LRS). You can open an Overseas trading accounts with brokers who provide such services. Decide which Exchange / segment you want to trade and look for a relevant broker.