System Administration Guide: Oracle Solaris Containers-Resource Management and Oracle Solaris Zones

id Command

Use the id command with the -p option to print the current project ID in addition to the user and group IDs. If the user operand is provided, the project associated with that user's normal login is printed:

#  id -p
uid=124(jtd) gid=10(staff) projid=4113(booksite)