Custom build mod, checkbox for each post - check users accounts

[rh2004]

Hello, on my site we all have a special account and we use this to send
items to (like an email address) well can someone create me a sort of
system where you (me) the user can check all the boxes in that one thread
that is under the avatar, under the users postcount and click a button at the
bottom or somewhere, where it will then create a comma determied output

example:

username1, username2, username3

This would save copying indididual users accounts instead you check the
checkbox on the users info box and at the end generate the output....

If you don't know what im taking about or you would be willing to create
this for me for a amount of money please let me know it would be excellent,
(note the account is different to the forum account (different names)

Thanks