And if you're using legitimate funds to infringe upon the human rights of others, the government has every right to stop you from doing that.
We take the perfectly legal crowbar out of the robber's hands when they use it to pry open home doors, so we also take the money out of the protester's bank accounts when they use it to infringe on the rights of others.
They have a right in what sense? I've never heard of a government doing that. The fact that they had to use an emergency order to do so suggests that they do not have the right.
In what sense are the truckers 'using money' to infringe on rights? The money doesn't seem critical to the movement to me. You can just as easily say they are 'using food' and mandate that they should be starved.
And yeah, I wouldn't be opposed to blocking access to food from these truckers until they moved their trucks, that makes sense to me. Their decision, at that point, would be to starve themselves by not going to where food is available to them, but otherwise it makes perfect sense to prevent access to necessities to people who are infringing on the rights of others, while they're actively infringing on those rights and can stop at any moment.