Retrieve S_SRM_TASK_HIST username from database connection

Hello,

We've had Siebel for a long time, and moved to SSO a decade or so ago. I used to be able to get the person's name/id number from S_SRM_TASK_HIST, when joining to v$session, with information that i had, specifically sid and serial#. I used this method alot, to find out who was hitting buttons on the browser screen that results in runaway queries on that database.

select SRVR_USER_NAME from SIEBEL.S_SRM_TASK_HIST

where SRVR_PROC_ID_VAL in (

 select substr(process,1,instr(process,':')-1) 

 from v$session 

 where sid = :1)