I think it can be done but I am not sure that I would like to develop this configuration.
A fader is a control with a CC number and range, to make this fader work on a parameter the CC number has to be assigned in a profile.
To make the same fader assigned to different parameters each parameter needs a dedicated profile.
Note: in the current version a maximum of 10 different profiles can be activated with buttons (see options dialog profiles tab)
Example: on a midi controller with one fader (CC1) and 4 buttons (Note 1,2,3,4) you can assign note 1,2,3,4 to the Profile: 1,2,3,4 command (see MIDI2LR server),
CC1 can be assigned to basic panel Exposure in profile 1, CC1 can be assigned to basic panel Contrast in profile 2, CC1 can be assigned to basic panel Highlights in profile 3 and CC1 can be assigned to basic panel Shadows in profile 4.
If more then 10 profiles are needed you can change the source to support more profiles.