Adobe PDF Form - Dropdown List too many entries

Hello community, 

I want to create an interactive adobe form.  In this form there is a table with two columns. To illustrate the problem, I use the well-known SAP flight model. Column A is the CARRIER ID and column B is a flight to be selected using a drop-down list.
There are several rows in the table: Each row represents an airline, e.g. Carrier ID = LH. Now I only want to display Lufthansa flights in the dropdown list. In the next line, where the carrier ID = BA, I only want to see flights from British Airways. Unfortunately, all flights from all airlines are always displayed in the drop-down menu. There is therefore no connection to the current CARRIER ID.

So in the interface I have a table within the table. Unfortunately, I cannot specify a WHERE condition when binding data. Althoug I specified a WHERE Condition in the interface the form send me all data. This is my Binding: $record.TABLE_A.DATA[*].TABLE_B.DATA[*]. The Key CARRIERID is available in both tables TABLE_A and TABLE_B.
I Think the problem is, that the Binding uses &record.TABLE_A.DATA[*] and not the current Table line. With the binding $record.TABLE_A.DATA[0].TABLE_B.DATA[*] I would get the flights of the first carrier id. But in second line, I need the data from $record.TABLE_A.DATA[1].TABLE_B.DATA[*] . 

Hope you can help me. Thanks a lot.