Assuming we create a private consortium chain over Ethereum and we want to use MetaMask for storing the keys and signing transactions to send the tokens belonging to this private consortium. Apparently, MetaMask only support the Ethereum mainnet along with three following testnets:
Ropsten
Kovan
Rinkeby
So, is it possible to use MetaMask for holding the keys and signing the transactions to send the tokens belonging to this private consortium that has been created over the Ethereum? And if yes, how to do?