Quote Originally Posted by Fursphere
Wait, I think I remember now.

/cast [target=n00b,modifier:none;modifier:alt,modifiter:c trl] heal; renew, bubble

You put the spells in the same order as the modifier.
This won't work either. If more than one conditional is specified within a set of brackets, both will apply. So for instance, "/cast [modifier:ctrl,modifier:shift] renew" will only happen if both control and shift are being held down. To get the other behavior, where it will happen if either is held down, use "/cast [modifier:ctrl] [modifier:shift] renew". There is no way to apply different modifiers to different spells in a single /cast like you're suggesting, you'll need more than one /cast.*

If you're interested in what is and isn't possible with conditionals, wowwiki's page on 2.0 macros is a decent place to start:
Making a Macro



*I reserve the right to be completely incorrect when making sweeping generalizations like this.