It depends on what "support" means:
- if you ask about having built-in functions/VIs, the answer is NO. Anyway, LabVIEW has control to almost any PC resource and therefore, you may try to implement the protocol (in case nobody did it before or is to expensive to buy it)
- if you think of integrating it in LabvIEW, you have some solutions (like DLLs, ActiveX, C code or even executables) - usually, when buying a device using a special protocol, the producer provides solutions for development too
Hope this helps