Let me be the devil's advocate, just to make sure that we are all on the same page.
"Benediction" means that the Blessed Sacrament will be removed from the tabernacle, and placed in a monstrance. After a period of time the "celebrant" will pick up the monstrance, and trace a cross in the air with it, after which the Blessed Sacrament will be removed from the monstrance and replaced in the tabernacle.
If one of the woman in your parish does this, then this is in violation with the teachings of the Church. Only a validly ordained priest or deacon can do this.
If, however, the woman just removes the Blessed Sacrament from the tabernacle, and places it on the altar (in a monstrance or ciborium), and reposes it after a while, without performing any blessing, this is licit as long as she has the expressed permission of the pastor.
In the event that your pastor is allowing a woman to perform the first option, he should be spoken to about how this is not allowed. If he does not remedy the issue, you should contact your Diocese's Office of Divine Worship, or the Bishop.
I don't think that it's necessary to go straight to your Bishop (I'm sure he's a busy man and has plenty on his plate already), but this should be used if the pastor completely ignores the Church's teachings, even after he has been humbly corrected.