Afraid this is both impracticable and rather pointless. Firstly, we have very few players, and those we do have will normally be able to tell you who built what. Secondly, since the change of server provider logblock on creative was wiped, thus we now only have records since the changeover, thus most things won't be counted. Thirdly, I'm not sure just how easy it would be to limit access to logblock to purely bedrock without being able to use commands.