Wake events: how to discriminate between "unattended" and manual

I recently set up an HTPC for my mother to replace her rented DVR (Cable company charges $13/mo for the DVR but a CableCARD is just $2/mo). I have everything pretty much like she wants it, but there is one remaining issue. She has an LG TV and wants everything to come on with the MC remote so she can ditch the extra remote. The TV has an RS232 port that I have hooked to a serial port on the HTPC. I can use this to control power on the TV. It's relatively simple to use Intelliremote to send the "OFF" command to the TV when she pushes the power button on the remote to put the HTPC in sleep mode, but I want the TV to power on only when she wakes the HTPC up with the remote.

THE PROBLEM:
The system event log can be used to trigger a task on wake that would power on the TV but it turns on even when the system is doing an unattended recording or some other scheduled task. (I don't want the TV coming on at 2AM when a backup starts, for example.) How can I exclude these unattended events so that the TV is only powered on when the HTPC is awakened with USBIR remote or keyboard?

I haven't been able to find any additional information on this anywhere. For the time being, I just repurposed an unused button on the MC remote to trigger the TV's ON command. At least that way she can ditch the TV remote. Hopefully someone can point me in the right direction on this at some point so I can implement a more elegant solution. :)