the "Process Manager" looks interesting, what platform are lsws running on ?
actually, this is typical on a busy shared hosting server, which mainly run php/mysql applications.
to reduce the load of php (or lsphp):
1. install and enable eAccelerator opcode cache;
2. monitor and identify high CPU usage accounts(like this Process Manager), trace the process, and ask the user to improve the php code, to remove low performance plugin etc ...
you can show the real-time stat at busy time(high load), see if we can give some suggestion for you.