BlueSpicePageAccess

Access restriction per page is done on group basis. If you allow a certain group to access the page, all other groups are locked out. "access" here means all actions, including read and edit. In order to do this, you use the page access tag, which can be entered anywhere in a wiki article:

 <bs:pageaccess groups="secure" /> 

Restricts all access to the group "secure". To add more groups, use commas to separate:

 <bs:pageaccess groups="secure,secure1,secure2" />

It is not possible to restrict access to a group you do not belong to, in order to not accidentally lock yourself out of the page.