Lofted Trim? I'm not familiar with that tool. Where is it located?
There is a Lofted Bends tool in the sheet metal tools.
A Lofted Trim to me sounds like a Loft Cut. Or the formation of a lofted surface which is then used with the Surface Trim tool. But those operations are not exclusive to sheet metal.
So the command was mentioned in a lesson or tutorial? If you can post an image of the page, or give some context in how the command was being used I'm sure it can be figured out.
I assume they just mean a Lofted Cut, but without more information it is difficult to be sure.
Or maybe they are lofting a surface with the intent to then use the trim command...