FlexVDI SPICE is improved version of SPICE. FlexVDI spice is allows VMs to use client's Internet connection via proxy-servers. Using client's Internet connection allow to eliminate risc of client abuse on Internet connection.
FlexVDI Spice server is not integrated in QEMU. To install it you shoud install qemu as usual then you have to run:
chimp install flexvdi-spice-protocol chimp install flexvdi-spice chimp install flexvdi-quemu
To install FlexVDI Spice client you can run
chimp install flexvdi-spice-gtk