What you seek is somewhat hampered by Ableton’s support for such things. First, support for re-mapping to some function on the selected track (or bank of tracks) is limited to controllers with Live Remote Scripts - and then usually in the way that the remote script has designed (typically mapping to the common controls always on a channel: volume, pan, sends). Some scripts can map to more: Mine, for example, can map to the macros on the selected track, selected chain, and first EQ3 device.
Second, you want to map to a plug-in, not a native Live device. The only way that you can do that generically with existing remote scripts is by mapping the rack macros to the plug-in’s parameters. But that limits you to 8. You’d need a remote script that was specificially written for that plug-in to be able to connect to more.