In this video you learn about Identity Session Conciliation - a method controlling the behavior when multiple users are logging on the same machine (see sk146835 for more details). The video covers as well some identity sharing aspects documented in sk149255.
Here you learn about the use case where the Identity Collector is used as an Identity Source.
The 7 min 40sec video starts with documenting the default behavior (only one user allowed per machine). At 5 min 30 sec you see the 'pdp conciliation idc enable' command changing this default behavior allowing now multiple users having their own identity session.