constructionwand-1.20.1-2.11
Forge Version 47.2.1
worldguard-bukkit-7.0.9-dist.ja
wand with angel mode enabled puts blocks in private
https://youtu.be/NoLtSc5w_Wg
pls

Could you tell me what server you are running? Worldguard is a Bukkit plugin, so you must be using a server that allows the use of Forge mods and Bukkit plugins.

I dont know much about Bukkit, but my assumption would be that Forge and Bukkit use a different event system, so Bukkit does not see the place events triggered by ConstructuonWand and can't intercept them.

I think WorldGuard allows you to prevent certain items from being used. Banning the use of wands in protected zones should probably work.