Interesting approach to the concept of property and identity. I agree with your idea that identity is entangled with many entities outside of your core self, however I am not certain about property being a necessary part of identity.
It does seem that the ego generates feelings of possessiveness that become part of one's identity, but it also seems that there are many creatures in the world that exist and have identity without property as we normally think of it. Unless you are suggesting something like a deer possesses a territory or the patch of grass it is eating.
btw - I selected your piece for today's #philosophy-review. keep up the great posts! https://steemit.com/philosophy/@aaanderson/the-philosophy-review-nov-29-2016
It is, property is not just a phyisical concept but also a relationship.
The same way that all your actions and consequences of your actions are your property, the same way all the results of your actions should be your property.
The same way that people who assault other people will face negative consequences for their actions.
The same way that people who worked hard for their money, should keep their money and not get taxed.
It's the same philosophy and it's true for both bad and good things. Identity and property is in-separable.