Conditional if user is a member of a child user group?

[007]

Is there a conditional to use to figure out if a user is a member of a child usergroup?

Say for example you have "Registered Users" and a member in that group. That member is also a member of child group "Consultants."

Is there a conditional, for example, like <if condition="$bbuserinfo[membergroupid]==X">

????????

Thanks.

~007