It is currently already possible to modify the global credential if you want. However, I added this topic to the feature request to be able to map a credential to a specific AD OU.
As for Zach1227's request. To my knowledge this is unfortunately not possible for any new asset. Lansweeper needs the correct credential before a scan can start. Without a correct credential, only very limited information can be retrieved from the asset. A possible way to do this would be to allow the mapping of credentials to asset groups. Obviously this would only work for existing assets.