I have a configuration like this:

<c:list-property>
    <c:map-property name="*:name" displayName="Entry">
            <c:simple-property name="name" required="true" type="string" "/>
            <c:simple-property name="path" required="true" type="string" readOnly="false"/>
            <c:simple-property name="read-only" description="Is this property read-only" default="false" readOnly="true" defaultValue="false" type="boolean"/>
   </c:map-property>
</c:list-property>

This has an included property "read-only".
The whole map itself should be read-only if this included property is set to true

Something like:

<c:list-property>
    <c:map-property name="*:name" displayName="Entry" read-only="${read-only==true}">


This would be needed in the as7 plugin. See e.g. Bug 817651