Can two people use the same email address?

This is not possible with Zalongo. Our system requires that each member has their own email address. 

Services like Gmail and perhaps some other email providers have the ability to add a + sign to create a disposable email address. More information found here.

If you have the gmail account you can add a + sign to make and they both will use the same Gmail account. However in Zalongo they would be two separate users.