This term has been covered by the website Wikipedia as "telematic performance"
This mediawiki site, a `wiki dictionary` about the nature and practice of free improvisation declines to duplicate the content of that listing. Below there is an introduction - a simple copy and paste. from Wikipedia then a link to the Wikipedia entry.
Introduction, copied from Wikipedia
The term telematic performance refers to a live performance (art, dance, music, etc.) which makes use of Telecommunications and information technology to distribute the performers between two or more locations.
While this may involve use of conventional videoconferencing technology, it has more recently come to mean the use of internet technologies. Performance groups my also refer to their events as internet concerts, online jamming, or teleconcerts.
Link to the Wikipedia page