You can do this with a Select Case statement but you do not give enough detail of what you want to do. You would, generally speaking, have one form that displayed many branches so you would open the form and display the data about that branch with code similar to this:
DoCmd.OpenForm "FormName", , , "[BranchID] = " & Me.BranchID
If you have a form for each branch then you might want to rethink your approach...
hth,
Jack