Only one account is permitted per player. Please see term 4.6 regarding the supply of player accounts for more information:
4.6 Your Account must be registered using accurate Registration Details and it shall only be issued once for you and not duplicated through any other person, family, household, address (postal or IP), email address, device used to access the Service or any environment where devices used to access the Service are shared (e.g. schools, workplaces, public libraries etc.) and/or account in respect of the Services. Any other accounts which you open with us, or which are beneficially owned by you in relation to the Services shall be "Duplicate Accounts". We may close any Duplicate Account (but shall not be obliged to do so).