Based on my 10 min playthrough.
1. Dropped a set, before identifying using scroll it highlights which players are eligible. Successfully registered in chronicle after idying.
2. Dropped a few more sets and uniques in the same game. Quits and creates a new game. iD using cain but didn't register in the chronicle.
Trading doesn't work. This is a good thing.
Hoarding the identification by quitting the game so that party members don't get it doesn't work too. I'm not sure if I leave party whether it works.
I like this too, otherwise there would've been an additional market for all unid things, and game groups with id parties, so everyone gets the grails.
First thought was, so we play split mf 8 player game, somebody finds something at Shenk, and I get the grail - where's the fun in that? But let's consider the scenario where you are clearing with a group, you do tons of damage to a boss and pop back to town for mana refills.. they kill the boss and get the Tryaels/grail and you get punished for taking a tp to refill? Most definitely not fair.