sync one iCal calendar to different Google calendars?

[CE]

I would like to be able to sync some of my iCal calendars with two different google calendars. However, I want different subsets of iCal calendars to sync with each of the two google calendars. is this possible to set up? I think it might be possible if i sign in and out of spanning sync as the two different google users, but i would like to be able to avoid this if possible, so that i have spanning sync always signed in for both google calendars, with each calendar syncing with the specific subset of iCal calendars that I have chosen. I do not want to share calendars between the two google calendars since I need the same iCal calendars to display differently in the two google calendars - in one google calendar I need the iCal event to appear simply as "busy" but in the second google calendar i need the full details of the iCal event to appear.

thanks for any suggestions on how to do this.