Don't know if it was intended this way, but I doubt it. When using the tbolt carrying Sulla, I find on a good server you can accurately self-NARC targets, and then hit them with the tbolts. However, when somebody on the ground would NARC or TAG a target, even when I knew exactly what target it was, the tbolts would go homing off with a mind of their own. I've never been able to accurately attack a target on the ground with tbolts when somebody else tagged them, but as I said, self-NARCing works.