To organize your contacts with custom filters on the LionDesk app, first design your filter on your LionDesk account. On your Contacts tab, select "Filter Contacts" then create and save your filter.
Now, on your LionDesk app, go to the "contacts" section. Tap the three dots in the top right corner to pull down the menu, and select "Saved Filters". Here you can choose from all your saved filters and apply them to your contacts accordingly.