[Jiaz]

@The Dude: You can select multiple packages and rightclick sort will only sort them according to current mouse column.
Looking at your screen, I now understand and I'm sorry but that's not possible. You want the sorting to only take place within part of the list and not all, right? At least that's how I understand this?!
Why not add category title/identifiert as a prefix of the package name? for example
-Tools - xy
-Tools - bla bla
-Tools - ffaf

That way you can select them and still have them all *grouped together*

and/or you could use Settings->Linkgrabber Filter-> Views and add custom views for each category and then hide/show them in linkgrabber.

another easy solution would be to have multiple JDownloader instances, seperated for each category