As I mentioned, the first thing you need to do is create a list for the LOB options, so that they can have a column for the group. Then the dropdown for LOB needs to be changed to use the new list for the data. You can either do that in the list, by changing LOB to a lookup, or in the form, by adding a data connection to the new list and setting the dropdown control to use it for data. In the dropdown, we can then add a filter based on the selected group.
Hilary Stoupa
