Terry,
If you want to allow the user to link chosen accounts to chosen people the easiest way would be to have a couple of matching attributes Account.Person and RegularUser.Accounts. Then the user can simply click the Add From List button for the attribute on either Account or RegularUser form. The system will automatically display the list of objects to choose from, and when the user selects the desired items the system will create the links automatically. This is the standard system functionality and no additional forms or code is required.
If, for some reason, you want to accomplish this without using object forms you can add a process with the following 3 rules in it:
PICK FROM 'Regular Users For Selection'
PICK ONE OR MORE FROM 'Accounts For Selection'
Account.Person = RegularUser
Here 'Regular Users For Selection' and 'Accounts For Selection' are the names of queries looking for objects RegularUser and Account respectively that you will need to configure. At run-time when the process is started the system will first display a list of people for the user to make a selection, and then a list of accounts for selection. The third rule assigns the selected user to each selected account.
Please let me know if this answers your question.