All LOGIN 2018 tickets must be assigned to a person. It means that every ticket has its owner and that bond is made through email address. Ticket assignation is made at the checkout process if you buy 1 ticket, and after the checkout if you buy 2 or more tickets.
If you have bought 1 ticket for yourself, your email address is already assigned to it. If you wish to buy a ticket for your friend or colleague and give it to him as a gift, you can do it using another email at the checkout process when you assign a new ticket.
Unfortunately, this is the only available option.