Have more than 4 controls across in design

When placing fields and I have 4 controls, but I may need to change some out but can't due to only having 4. EG>>

City, Country, State, Zip Code
If country equals Australia I want the drop down with Australian states
If the country equals USA I want a drop down that only has USA states, But I can't because I can't design the form to include all the different State fields I require for my rules.