Against which adults could I get an order for protection of children?
No special relationship between the child and the abuser is necessary1 as long as you believe that the person committed one of the acts described in For what crimes can I get an order for protection of children? It may be a neighbor, a teacher, or a stranger. It may also be a parent or relative, however you may also want to consider an order for protection against domestic violence if the abuser is related to the child.
Note: If your child has contact with an adult who committed a crime against another child, you cannot apply for an order for protection of children unless the abuser committed a crime against your child. For example, if you know that there is a registered sex offender/ pedophile living next door, you cannot apply for an order for protection to keep him/her away from your child unless s/he harms your child.
1 N.R.S. § 33.400(1)