How to apply conditions for more than one row in a process

Hi! I´ve just created a process model for invoices: first, the user fills the invoice fields, and then some checks are made in the process (logic nodes) to determine if the invoice is accepted or rejected (basically, if all the conditions apply then the field "status" of the invoice changes)

Now, I´ve added an interface to create invoice lines. And I was wondering how can I make a similar logic (apply conditions for each row and then change the invoice line "status" to "accepted"). I know how to do it for one row, but not how can I "iterate" and make all the invoice line created to "pass" through the conditions

Any help would be useful. Thanks a lot!