How do i create a Category for all torrents of the same tracker?

Add category, go to the Properties > Capture and set there a tick next to Tracker, paste tracker url into Transfer Load > Match field. New transfers with the tracker url should automatically join this category. The rest of already loaded transfers you can filter with the Text Filter with Tracerks filtering enabled and set the category for them manually (select all and set category from context menu).

Bu i don't want to move torrents to this category. I want this category to show all torrents from a tracker but other categories are the ones that put files in the correct folder

Let's say i have the folder "movies". Sometimes i download from public trackers,sometimes from private. public trackers are not important but i want a category that contains all torrents from that tracke BUT they must be in the movie cateogry too.

It sounds like setting two categories simultaneously. I may be wrong but I think it is currently not possible with Tixati. You can sort of secondary categorize transfers by using Description column (enabled in Layout). You can sort and filter transfers by that column, however descriptions are added manually and they don't have other functionalities of categories.

Select the movie category -> use text filter (tracker checkbox, type the tracker name)