Online gaming platforms can be divided into two groups: those that have an authorization and those that do not have a license. Online casinos holding an authorization are attached to a jurisdiction.
This means that these virtual casinos are subject to the laws of the country which granted them the license. Also, that the courts of the country which grants a license to an online gaming platform, are competent to judge all disputes arising from their activities. As for casinos that operate without a license, they are considered illegal.