[Answer]-Displaying "info" by selecting foreign key in django admin

It sounds to me like you want an employee to be able to use the admin site to create an employee order from a customer order. I think it could be as simple as adding a raw ID field for the customer order. That is, I think you can just change EmployeeOrderAdmin like so:

class EmployeeOrderAdmin(admin.ModelAdmin):
    list_display = ('employee_order_date', 'employee_placed')
    raw_id_fields = ('order',)

Now when an employee creates an employee order, they will be able to use the OrderAdmin page to find the order they want.

Additionally, suppose you want that pop-up window to display the orders in a particular way. In that case, keep in mind that requests to display that pop-up window will contain an additional GET parameter called pop. You could:

class OrderAdmin(admin.ModelAdmin):
    def queryset(self, request):
        qs = super(ActiveOfferAdmin, self).queryset(request)
        if request.GET.get('pop'):
            return qs.order_by(...)
        return qs