In a few other games I have played, there was a way to assign a member if your party as a Focus Target in order to direct macro spells at them. Is there any way using macros in FFXIV to directly cast a skill on anything but your target (<t>) and yourself (<me>)?

Example: Playing as Marauder, and the healer needs assistance when the tank gets low on HP. Is there a way to create a macro to cast Cure I/II on the tank? If so, can it be done without losing track of your target?