Quoting MetaMask multiple accounts

Well, in that case, you can find this guide at your rescue. Apart from providing you with basic information regarding the same, we'll also be helping you create MetaMask multiple accounts both in the MetaMask extension as well as MetaMask mobile app.
https://sites.google.com/metmskcrm.com/metamaskchrom/blog/metamask-multiple-accounts
https://sites.google.com/metmskcrm.com/metamaskchrom/blog/internal-json-rpc-metamask