DNN source includes Country and Region controls. If you select Canada as country, related Regions are populated and displayed at Region dropdown list.

I have created Main Company and SubCompany dropdown lists at Form and List. Are there any way to configure these lists so that SubCompany list populated from MainCompany item.

At current design, although I select one of the Main companies from the list, all subCompanies are displayed regardless of selected main company. I need to set relations for these fields.

Same goes for a third level list named Location.

Thanks.