id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
552	ProcessExist/ProcessList optional username parameter	Developer@…		"ProcessExist and ProcessList could provide an optional username parameter to limit the search to processes owned by a given user. Using the PID returned by these funtions, the other process functions could be effectively limited to processes owned by a given user by specifying the PID as opposed to the process name.

$PID = ProcessExists (""notepad.exe"", @UserName)

This thread:

http://www.autoitscript.com/forum/index.php?showtopic=79434

discusses highlights the need.

Athough this may be accomplished using WMI, WMI is just too slow. 
"	Bug	closed		AutoIt	3.2.12.0	None	No Bug