Certainly the studies I've seen suggest that in Afghanistan almost 80% to 85% of sexual violence against women is perpetrated by family members, so in answer to your question, this would be very much a civilian-based form of sexual violence, which is not to say that security forces don't do it as a form of retaliation, particularly when opportunities present themselves when they have people in detention.
En réponse à la question, c'est donc une forme de violence avant tout commise par des civils. Toutefois, cela ne veut pas dire que les forces de sécurité ne s'en servent pas comme moyen de répression, en particulier contre les personnes détenues.