I have one aplication with 2 form. One it's a table for machines and the another one it's a table for fundraisers . I want create one list field that it can update automatically when the user selected the camp of centers.

In another words, when the user select the comercial center, the camp of the machines can update automatically filtred by the comercial center. And the definition of the machines al centers it's in the table of machines.

Someone can help me please?