The abuser must be served (given) papers that give him/her your temporary restraining order (if the judge gave you one) and inform him/her about the hearing date. The clerk of court can give you information on how the abuser will be served but according to Wyoming law, the court is supposed to arrange for service of the temporary order regardless of whether the abuser lives in Wyoming or out of state.1
If the respondent is not served before your hearing, ask the judge to reschedule the hearing. Be sure to also ask the judge to extend your temporary order if you have one.