This is a dirty way to find out.
SELECT o.name
FROM sysobjects t
JOIN sysobjects o ON t.parent_obj = o.id
WHERE t.name = 'your_trigger_name'
[EDIT]
According to another answer and comments, I think this can fit you (version MSSQL2000)
SELECT o.name
FROM sysobjects t
JOIN sysobjects o ON t.parent_obj = o.id
WHERE t.id = @@PROCID
source
share