[Zope] Help with tal:condition

I newbie and need some help figuring out tal:condition. I was able to seperately get two tal:conditions to work on my plone site. However I haven't been able to figure out how I can 'or' the two conditions together. Can someone look at the conditions below and tell me how I can "or" these two together, so I can use in a single div tag. tal:condition="not:here/portal_membership/isAnonymousUser" tal:condition="python: (here.portal_url()!=here.aq_parent.absolute_url())" Thanks, Steven