I have this skewer but it seems to have, what looks like some sort of security feature and I can't figure out how to remove. Can anyone identify this or have any suggestions on how to remove it?
I have to deal with these security skewers from time to time because people forget they are on there, lose the key, sell the bike, lend the bike to someone and don't tell them about the stupid skewer -- they are pretty irritating.
Many types you can remove without damaging (though may not be able to do back up). This type I think you will have to permanently alter to remove, either with a hacksaw, grinder or drill. It won't be very hard, just plan how you are going to do it and don't let the powertools damage the frame/paint.
This reddit discusson screenshot covers a similar question.
Based on the photo you've included it looks like a Pitlock skewer (article #P050000). If you have not noticed yet, these are used as a lock to prevent unauthorized wheel removal.
To remove these you need a special PIT-key that goes onto the part shown in the your first photo. I'm not sure how to remove the skewer without this special key, perhaps you can buy it from Pitlock or maybe someone here knows a workaround.