Is this site associated with any religious groups?

The short answer is NO.

Religions are efforts by men to "reach" God (actually to replace God with something or someone else!).

God does have many people who are involved in Jewish and Christian religious institutions because these groups are descended from movements originally started as a result of the divine touches of God in mankind's history.
However this site is not connected with any of these groups. Click this link to see information about the reasons why.