Is it possible to filtering heatmap? Like excluding internal traffic, etc.
If you are talking about the extension, then no - there is no way of filtering out the data in Site Inspector. However, you could apply the Don’t collect data from these IP addresses (How can I ignore traffic from my office? | Piwik PRO help center) and it will work on the data that is to be aggregated in the analytics module. Also, you could filter it out by creating a report which would identify custom events created by the heatmap and then apply a filter that would exclude a certain IP address.