Approval rule type ANY when USERS are added parallely

Hi All,

We have a requirement as follows.....

Approvers(users NOT GROUPS) are added in a collection along with the level as 1,2,3.......so on. The contract document is sent for approval in parallel to all the users at their respective level i.e., all the level 1 users are added in a single approval activity.

Now our requirement is, if any of the approvers approve it in a level then the workflow should automatically move to the next level with out waiting for the approvals of other approvers in that level.

Level    Approver (User) 1       A 2       B 2       C 2         D