Yes. We can instruct how the balance will be disperse. The accounts that will decide how the balance will be managed will be fixed account addresses in the script and a condition if all accounts must "agree" or a % of them must agree or for certain transaction amount say 100nxt it will require X% to instruct" but for amounts higher it will require 100% to instruct.

So we have such an account that holds 10000NXT. Then we have in the script that only 4 accounts can instruct, these 4 accounts will be listed in the script. For transfers less than 100 we need 70% of the accounts to instruct for transfers above 100nxt we need 100% to instruct.
Then account 1, 2, 3 send instruction to the holding account to Send 50nxt To account Z and that's enough to complete a transaction for 50nxt from our main account to account Z.

I am sorry I suck in explanation!!! Maybe should write code in pseudo code to demonstrate it but programming all day drains me and would like to try talking haha

Edit: Sorry I just saw that you asked for the point. The point is that I am trying to make an account controlled by more than 1 person. So we can get as close to decentralized exchange as possible. Also if we can have an account controlled by instructions from other accounts we can have community funds controlled by few people etc..