No, you can only do what you want with the displays in reverse (and one Nav window), ie in Develop, set Loupe on display 1 with the Nav window and Grid on the 2nd screen for thumbs.
Edit: There is a kind of kludge you might want to try.
When activating your 2nd screen you can select Loupe - Live
Change Screen 1 to Grid/Thumbnail view
Hover the cursor over any thumbnail (can use the grid or the filmstrip) and screen 2 will switch to that image
Move the cursor over to the 2nd screen and click it to magnify
Move cursor back to the thumbnail on screen 1 and then as you move the cursor around the image on the 2nd screen follows the cursor.
Yea, kind of a kludge but it sort of gets the functionality you're looking for. Not as versatile perhaps.