exec('screen -dmLS client_1 mono /var/www/clients.exe ' + ip + ' ' + port + ' > /var/www/1_log.txt');

[program:myapp]
command=nohup mono /var/www/clients.exe 127.0.0.1  8080 > /var/www/1_log.txt
autostart=true
stdout_logfile_backups=5
autorestart=true
startretries=3
stderr_logfile=/var/www/1_log.txt
stdout_logfile=/var/www/1_log.txt
environment=SECRET_PASSPHRASE='это секрет',SECRET_TWO='второй секрет'