Hello,
that depends on your images; if they are in RAW format, you can
not (if I remember correctly, Hugin does not handle RAW format).
If they are in tiff or JPEG, you can setup an External Editor
with Hugin as the application.
If you do not export your images, be aware that any development
settings will not be applied on your images.
Cheers,
Matthieu
PS: I do not have Hugin nor Lightroom in front of me right now and never
had setup that kind of workflow, but it should work.