flowable query process initiator

SELECT DISTINCT
	RES.START_USER_ID_ AS startUserId
FROM
	ACT_HI_PROCINST RES
	LEFT OUTER JOIN ACT_RE_PROCDEF DEF ON RES.PROC_DEF_ID_ = DEF.ID_ 
WHERE
	RES.PROC_INST_ID_ = #{
    
    processInstanceId}
ORDER BY
	RES.ID_ ASC

1.#{processInstanceId} Instance ID
2. Set the initiator when starting the process

Authentication.setAuthenticatedUserId(userNameId);