Is there any possibility to add a person in two different places of same Purchasing Heirarchy (tree)

We have a scenario here;

Here is the hierarchy

Department-I

==========

1. Mr.A>Mr.B>Mr.C

(Top------>Bottom)

Now, Mr.C is also involved in some functions of Department-II. in Department-II, the following hierarchy is required

Department-II

==========

1. Mr.A>Mr.X>Mr.C>Mr.Y

(Top------>Bottom)

Now, Oracle EBS will not allow us to have Mr.C in both places same time.  The question is, how to resolve this issue in Oracle Application?

Your response will be highly appreciated!