For intance, if a user wanted to enter 4 persons, and another person wanted to enter 6 persons, each with a name, phone number, and email address, are there form controls that would allow that? 

Ideally I would like the inputs for each person to be entered to show up all at once. So if the user indicates they have 4 persons to enter, they will see 4 name text boxes, 4 phone number boxes, etc. Then I would like to store those values in some sort of collection and have the records created in Salesforceas part of a workflow. How much of this, if any is possible?