Yes it can. I had mine taken down to 1 3/4 lbs. I don't know how my smith did it. I can tell you that you can get a replacement spring for it that is supposed to bring it down to 2.5lbs.
The site is Trigger Springs|Trigger Pull|Pillar Bedding|Rifle Accuracy
He even puts full illustrated pictures on how to do the job.
The only thing I will say is that the geometry of the trigger sucks. So while you can make it creep free it still has issues in my book. If you move your finger along the trigger it will change the pull significantly. My smith guaged it in the middle at 2 1/4 and 1 3/4 at the tip.
Long story short I'm hoping Timney will make one. I called them and they told me if enough people call in requesting one that they will make it. So give them a call.