iStore - Using it to enter orders for many customers

Hi,
I know when iStore is implemented, we normally give access to customers so they can enter their orders directly -- that's the big advantage of iStore,

However in our case, we need to give the remote branches an easy screen to enter orders for their customers (ie the customers will not be able to enter
orders directly into a system such as istore).

So we were thinking of providing access to iStore to the branches so they could enter their customer orders.

However it appears we cannot enter orders for more than one customer under the one iStore login (ie Oracle Applications user).  Therefore, to switch customers we need to have a login setup for