port-monitoring with multiple sources

Hi,

is it possible to have a port-monitoring session active with more than one source-port and are the capture files specific for a port or for a port-monitoring session?

For example:

port-monitoring 1 source-port 1/1/1 file /flash/a.enc size 32 port-monitoring 1 source-port 1/1/2 file /flash/b.enc size 32 port-monitoring 1 resume

Thx.