Currently in Budget Control Parameters, we are only able to select one Account Structure. This limits our ability to use budget control on accounts if they are across multiple Account structures.

Navigation: Budgeting > Setup > Budget Control > Budget Control Configuration > Define Parameters (tab)

Field: Account Structure 

Only selection of one Account Structure is Possible.

Often it does not make sense to have all financial Dimensions in one account structure for all ledger accounts. It should be possible to use Budget control on more than one account structure.