run php-fpm under a linux user
pool.conf file:
[@@USER@@]
listen = /var/run/@@USER@@_fpm.sock (tcp instead of .sock, for every site another tcp port is also possible)
listen.owner = @@USER@@
listen.group = @@USER@@
listen.mode = 0660
user = @@USER@@
group = @@USER@@
set file perms and create required dirs!
mkdir -p /home/$HOME_DIR$PUBLIC_HTML_DIR
mkdir /home/$HOME_DIR/_logs
mkdir /home/$HOME_DIR/_sessions
chmod 750 /home/$HOME_DIR -R
chmod 700 /home/$HOME_DIR/_sessions
chmod 770 /home/$HOME_DIR/_logs
chmod 750 /home/$HOME_DIR$PUBLIC_HTML_DIR
chown $USERNAME:$USERNAME /home/$HOME_DIR/ -R
HHVM:
sudo cp /etc/init.d/hhvm /etc/init.d/hhvm_domain
sudo cp /etc/default/hhvm /etc/default/hhvm_domain
sudo cp /etc/hhvm/server_www_canus_at.ini /etc/hhvm/server_www_domain.ini
sudo vi /etc/init.d/hhvm_www_domain:
...
NAME=hhvm_www_domain
...
PIDFILE=/var/run/hhvm/pid_$NAME
/etc/default/hhvm_www_domain file:
This is a configuration file for /etc/init.d/hhvm.
Overwrite start up configuration of the hhvm service.
This file is sourced by /bin/sh from /etc/init.d/hhvm.
Configuration file location.
Default: "/etc/hhvm/server.ini"
Examples:
"/etc/hhvm/conf.d/fastcgi.ini" Load configuration file from Debian/Ubuntu conf.d style location
CONFIG_FILE="/etc/hhvm/server_www_domain.ini"
User to run the service as.
Default: "www-data"
Examples:
"hhvm" Custom 'hhvm' user
RUN_AS_USER="@@USER@@"
RUN_AS_GROUP="@@USER@@"
Add additional arguments to the hhvm service start up that you can't put in CONFIG_FILE for some reason.
Default: ""
Examples:
"-vLog.Level=Debug" Enable debug log level
"-vServer.DefaultDocument=app.php" Change the default document
ADDITIONAL_ARGS=""
PID file location.
Default: "/var/run/hhvm/pid"
PIDFILE="/var/run/hhvm/pid"
/etc/hhvm/server_www_domain.ini:
; php options
pid = /var/run/hhvm/pid_www_domain
; hhvm specific
hhvm.server.port = 9001
hhvm.server.type = fastcgi
hhvm.server.default_document = index.php
hhvm.log.use_log_file = true
hhvm.log.file = /var/log/hhvm/error_www_domain.log
hhvm.repo.central.path = /var/run/hhvm/hhvm.hhbc
sudo update-rc.d hhvm_www_domain defaults
sudo service hhvm_www_domain start
sudo service nginx reload
This should do the trick to use hhvm and php-fpm under a normal linux user with easyengine setup vhosts 
Rahul could you add this to easyengine, i have read that someone wrote a command line example like: ee site create user domain.tld. That would be nice