Is it possible to have different role provider in same web site?

I have two applications using different membership provider in one web site.
It logs in fine, but when I create account, I can't get GUID because of role provider.
I created two roles, but I don't know how to assign different role providers for each membership provider.
It seems that it only uses default rolemanager provider, which will cause problem for another applications.
Is it possible to assign role provider for each membership provider?
Thanks


---- web.config -------




<roleManager enabled="true" defaultProvider="CustRoleProvider">
            <providers>
          ...