Maybe it depends on the country, but private companies cant generally get warrants to infringe on people's rights afaik. If justified is interpreted as 'legally justified', then it would make sense that only government agents could be justified to act in this manner. Of course, government agents are known to operate outside the law as well.
I wouldn’t assume that private companies and individuals cannot get warrants.
However, they look very different. The major distinction is that when a private party requests an injunction allowing them to e.g. trespass on their neighbor’s land, the court will require notice and a hearing for the defendant. So, if a chemical plant needs to do earth works on a neighbor’s land to prevent a collapse, etc. the judiciary may well issue an order requiring the neighbor to let the company enter.
Frankly, notice and hearing should probably be required for some criminal warrants too. I can think of a few indictments and arrest warrants that have recently been issued where there is a genuine question as to probable cause and the alleged illegality of the conduct. It’s not fair for people who are not a flight risk to be arrested (and often imprisoned) with no opportunity to defend themselves.
