MixStation Pro for my Behringer can do this.
You enter ‘re-gain’ mode then when you adjust a channel’s gain, all the related channel levels (in Auxs, FOH etc) get conversley altered as well as all the thresholds on any compressor, gate, limiter or anything else that is level sensitive.
So if you want to drop a socket’s gain by 6dB, you can do so and all the faders and sends and everything else are raised 6dB at the same time and all the thresholds for compressors etc. are lowered 6dB.
This effectively allows you to adjust a channel’s gain mid show without affecting that channel’s level anywhere!