As mentioned in my other post here; https://www.askmehelpdesk.com/corporate-law/wrongful-termination-44665.html

Is it possible to sue a employee (not the company who employes her) for slander, and defamation of character?

As a result, both myself and my son have lost decent paying jobs, and denied unemployment insurance, which we have to try and appeal.

I was the supervisor at my job, and had difficulty getting this women to cooperate (her boyfriend was a supervisor at another location) with getting her work done, so in turn I would have to complete her work, if her work was not done, it would be blamed on me, or my son.

Every time I would yell at her to get her work done, or take less cigeratte breaks, she would call her boyfriend, and tell him I was yelling for no reason, which would get to the owner, and I would be punished. I requested several times to write her up (she threw a chair in disgust of being yelled at, to watching TV/putting feet in hot-tub after hours), but her boyfriend who is friends with the owner always managed a way to prevent this.

Now, since I was terminated, she took over morning shift, and is full-time, and her boyfriend looks to be taking over my Supervisor Position at night.

Is it possible to pursure actions against them, as opposed to the employer?

You need proof of remarks she made against you. You needprrof that they were untrue. You need proof that they resulted in the loss of your job.

Even if you can prove all that, what are you going to sue her for? From your other threads, I would guess she is not in a high paying job and probably doesn't have a lot of money. So even if you win, what will you collect?

You should not be YELLING at anyone.

You can try. I don't know how much good it would really do you in your situation. It's not like the court can order them to give you your job back, even if they're found guilty. I am rather curious as to why the owner of the company was so quick to take her boyfriend's word for everything and discourage you from doing your job as supervisor. I wonder if there were some other issues going on here.