Q: Is it compatible with EasyApache?
A: Yes, it is. EasyApache works/fully integrates with mod_lsapi.
Q: Is it compatible with PHP Selector?
Q: Are .htaccess PHP directives supported? For example, mod_php like directives?
A: Yes. mod_lsapi can read php_* and php_admin_* directives.
Q: I have httpd.conf with SuExecUserGroup options. Do I need to add mod_lsapi related options for VirtualHost?
A: No need to change httpd.conf. mod_lsapi can read suPHP_UserGroup, RUidGid, SuExecUserGroup, AssignUserID parameters to determine user id under which site is running. Additionally you can use lsapi_uid_gid or lsapi_user_group as a native way to specify user / group ids.