Nope. Almost everybody has more than one device (laptop, phone, and maybe a tablet) with more than one IP (both home wifi and phone data). Everyone has multiple email addresses.

You could get by with requiring a unique phone number, but that still risks excluding users, and can get expensive if you intend on catering to an international audience. Even in that case, some people may have a landline and a cell phone, or they may use a friend/spouse/relative’s phone to circumvent your limits.