The job stays the same, the address changes constantly
A Pennsylvania light industrial or facilities desk may place workers into a dozen different municipalities in a single week. That is administratively different from placing them into a dozen different companies in one city, because municipal earned income taxes here follow the place the work is performed, and payroll needs the worksite address rather than the client's head office.
This is a data capture problem rather than a payroll problem, and it is solved at intake or not at all. Making the worksite address a required field on the assignment record costs a coordinator four seconds and prevents a class of correction that consumes hours later. Confirm your own obligations with the Department of Labor and Industry and your own counsel.
It also tells you something commercially useful
Once worksite addresses are captured properly, a branch can see its actual geographic footprint rather than the one it assumes it has. Most discover that a large share of their volume clusters around two or three corridors, which is useful when deciding where the next recruiting effort should go.