Im from australia and received threats from a person using a anonymous name on a american website "kasamba". ?

Answer 1

the police, depending on the nature of these threats

your isp might be willing to help as well

try emailing them

Answer 2

It is a criminal matter....contact the FBI in the USA or RCMP in Canada.  Both have branches that deal with this type of crime.  Depending on the type of threat issued.

Source:  30 years in Law Enforcement.

Answer 3

take care of it yourself, punch'em in the icon, block'em, sneer at'em but don't just sit there.  Try the Federal communications commision

Answer 4

Try the police department  as this is a matter i think they

would deal with .  A threat is still a threat , and since they have

not stopped , you have no choice but to take it further !

Good Luck