Tvheadend

Hi,
I tried to find any tvheadend settings that able to limit streams globally but found nothing after searching the whole internet about tvheadend that I just cant believe...
My main goal would be to limit my concurrent DVB-C streams to prevent an user watching streams while device is recording a stream even on the same mux.
Its reason is that Raspberry has very limited bandwidth resources especially on USB-LAN that results dvb ts errors in recorded stream.
Are there any good solution already exists for that or I just have to give up this easy method?