Don't really think there is a way to do this within the LANDesk console. If you have access to your database and you are running SQL, try the query below.
select * from ld_task
where task_wake_machines != 0
This will return all tasks that are set to wake up the machines.
Thanks. I'll ask my DBA to run that query when he's at the office again. I'll let know whether this solved my issue.
Edit: the DBA ran the query and the result was as expected. Thanks.
I decided to run this query on our DB and was a little worried when I actually got some results. However, all of the results are some Power Management tasks that I have tested in the past.