Solution 1:
Log an enhancement request for this feature, visiting the Stat Community Idea portal at http://communities.quest.com/community/stat?view=idea.
Solution 2:
Try to extract that information querying the Stat_audit table. For example:
select regexp_substr(to_value,'([A-Z]+)',1,2) as stat_user, run_dt
from stat_audit
where tbl_name = 'STATUSER'
and run_action = 'I'