Yes, you can use a data element to return the desired values, but that
must still be a comma-separated list. This is because ultimately, Adobe
Analytics only accepts a comma-separated value for that field. See
https://experienceleague.adobe.com/docs/analytics/implementation/vars/config-vars/linkinternalfilters.html?lang=en#s.linkinternalfilters-in-appmeasurement-and-the-analytics-extension-custom-code-editor
So while you can't use a regular expression, you can, for example, have
a data element t...