usdClassifierControlListNotSrc 1.3.6.1.4.1.4874.2.2.27.1.1.4.1.3

Invert the meaning of the source IP address and mask objects. For example 'not 10.10.0.90/255.255.255.255 (host address)' would result in all source addresses except for host 10.19.9.90 being matched.