Try this:

lcCurrentUser = getenv("USERNAME")
FOR EACH PROCESS IN oStuff
	lcOwner		= ''
	PROCESS.getOwner(@lcOwner)
	IF PROCESS.NAME = ltProcess and not empty(lcOwner) and lcOwner = lcCurrentUser
		i = i + 1
		IF pnPID <> PROCESS.ProcessId AND ltKill = .T.
			PROCESS.TERMINATE()
		ENDIF
	ENDIF
ENDFOR 

>Hi All,
>
>I need to get the owner of process that is running so that if they try and open another instance of the program it will not allow them to and kill that process.
>
>I can get the process and the current processID but my code will then kill all instances of the application effecting all users. I only want to prevent the user from opening a second instance.
>
>

>
>check Instance('myprog.exe')
>
>*----------------------------*
>FUNCTION CheckInstance()
>*----------------------------
>LPARAMETER ltProcess, ltKill
>
>oManager = GETOBJECT("winmgmts:")
>oStuff = oManager.InstancesOf("Win32_process")
>i = 0
>
>pnPID = GetProcessID()
>
>FOR EACH PROCESS IN oStuff
>   IF PROCESS.NAME = ltProcess
>      i = i + 1
>      IF pnPID <> PROCESS.ProcessId AND ltKill = .T.
>         PROCESS.TERMINATE()
>      ENDIF
>   ENDIF
>
>ENDFOR 
>
>RETURN i
>
>*----------------------------*
>FUNCTION GetProcessID()
>*----------------------------*
>* Identify the process id for the process
>DECLARE INTEGER GetCurrentProcessId IN kernel32
>pnPID = GetCurrentProcessId()
>
>RETURN pnPID 
>
>ENDFUNC
>
>