NBT tags don't work
It either prohibits all multistructures or allows all multistructures
You cannot prohibit a specific structure

Here's what I use

• item:immersiveengineering:hammer.withTag({multiblockInterdiction: ["IE:Excavator", "IE:ExcavatorDemo"]})
• item:immersiveengineering:hammer.withTag({multiblockPermission:["IE:Excavator", "IE:ExcavatorDemo"]})

ImmersiveEngineering-1.16.5-5.0.5-140
Forge 36.2.8

Full list of mods
https://pastebin.com/QaeYhzpS

In general, I should be prohibited from making an excavator
Help

An incorrect translation of the RU text is used there

You're using the wrong names for the multiblocks, for the excavator you need {multiblockInterdiction: ["immersiveengineering:multiblocks/excavator"]}