it is possible to have 2 email accounts in cloud

You cannot add another account to an iCloud account. You can add up to three 'email aliases' to an account- these are additional addresses (not accounts) which deliver into the same inbox as the main account. (In fact it's a good idea to give out alias addresses, rather than the main address, because if they attract spam you can easily change them.)

You should be aware before you start that once you've created an alias you cannot turn that address into a full iCloud account or move it to another account.

More information on aliases here: http://help.apple.com/icloud/#mm6b1a490a

Otherwise you can create a new iCloud account and add it to the mail app on your Mac or iOS device, or sign into it separately at icloud.com.