What is best way to determine if a task was performed by a proxy user. Or PLEASE ADD Task_ID to the

The audit log doesn't have the TASK_ID as a column so the only way that I have come up with to determine if a task was completed by a proxy user is this:

SQL Server query for a specific bp

select  al.userid, al.proxyuserid,  wft.end_date, al.eventtime, abs(convert(float,al.eventtime ) - convert(float,wft.end_date)) as timeDiff

FROM sys_wf_process_view wfp

INNER JOIN sys_wf_task_view wft ON wfp.id = wft.process_id

INNER JOIN unifier_auditlog al on  al.SOURCEID = wfp.source_id and al.sourcetype=wfp.bp_type and wft.action_name = al.description and wft.assignee_id = al.userid and abs(convert(float,al.eventtime ) - convert(float,wft.end_date)) <0.0009