Dynamic Relationfiltering in forms

We want to realize inventory management in Noteforms. For an organized way we want to ask the form user before, which category of inventory he/she wants to give out or something else. Based on this information like a Category, the related Inventory-Field should be filtered so that not every inventory-item is shown to select, otherwise the user have to search between to much inventory items. First the user should can choose an category, which is part of the related inventory-item, after this the user should only get shown items with this category choosen before.