Do you mean you want to set up folders (called groups in DT) for different emails? You can do this with smart rules. How smart rules work is explained in the manual, but to be honest I only gave it a skim and then I figured out how it worked by actually making some. The menu options are fairly self-explanatory and if you’ve got a computer-y/logical mind you’ll probably be fine.
For example, you could create a group for emails about X issue, then create a smart rule “for emails that contain the word X, move to this group”. Then just run the rule and all the emails will be moved for you.