You'll see something similar to this in your web.xml (the "myRoleName" will be replaced by the sercurity role as defined in your Webloggic Server Console under Security > Realms > myreal > Groups). If you have multiple roles, this will differ slightly.
<security-constraint>
<web-resource-collection>
<web-resource-name>Protected Area</web-resource-name>
<url-pattern>/flows/*</url-pattern>
<url-pattern>Controller.jpf</url-pattern>
<http-method>GET</http-method>
<http-method>Post</http-method>
</web-resource-collection>
<auth-constraint>
<role-name>myRoleName</role-name>
</auth-constraint>
<user-data-constraint>
<transport-guarantee>NONE</transport-guarantee>
</user-data-constraint>
</security-constraint>
<login-config>
<auth-method>FORM</auth-method>
<form-login-config>
<form-login-page>login.jsp</form-login-page>
<form-error-page>fail_login.jsp</form-error-page>
</form-login-config>
</login-config>
<security-role>
<description>
Only role for the Application
</description>
<role-name>myRoleName</role-name>
</security-role>