You want to know, how you can apply other people filter, that they shared?
Here is a short text explanation from my own Loot Filter Thread:
How to Import Loot Filter:
Method 1:
Copy xml files into root partition, most likely [C]:
C:\Users\User\AppData\LocalLow\Eleventh Hour Games\Last Epoch\Filters
Method 2:
Copy pastebin content → In-Game Open Loot Filter (Shift + F) → Select No Filter → Import Filter → Paste Clipboard Contents
If you asked something differently i am sorry, but if you further specifc, i am sure we can help you.