Process Start White List defines on who is permitted to start the process. By default, everyone can start the process. When configured, only those found in the mapping will be allowed to start the process.
Figure 1: Map Participants to Users - White List
It Process Start White List has the same mapping options found in conventional participant mapping therefore there's , thereby making available a wide range of options available.
You may also write your own beanshell script or extend it using custom participant mapping plugin as well.
Figure 2: Map Participants to Users mapping optionsMapping Options