Yes, this can be done. Inside pom.xml you add:
<configuration>
<fileTemplate>${project.basedir}/src/main/resources/template.ftl</fileTemplate>
</configuration>
and then create file template.ftl into resources dir with following contents:
<#function licenseFormat licenses>
<#assign result = ""/>
<#list licenses as license>
<#assign result = result + " (" +license + ")"/>
</#list>
<#return result>
</#function>
<#function artifactFormat p>
<#if p.name?index_of('Unnamed') > -1>
<#return p.artifactId + " (" + p.groupId + ":" + p.artifactId + ":" + p.version + " - " + (p.url!"no url defined") + ")">
<#else>
<#return p.name + " (" + p.groupId + ":" + p.artifactId + ":" + p.version + " - " + (p.url!"no url defined") + ")">
</#if>
</#function>
List of third-party dependencies:
<#list dependencyMap as e>
<#assign project = e.getKey()/>
<#assign licenses = e.getValue()/>
${licenseFormat(licenses)} ${artifactFormat(project)}
</#list>
They you add your own info to this file (to the end). The file is a Freemarker template.