i love to abuse @ARGV and <>...

if (grep m{nfs}, grep m{/home}, map <>, local @ARGV=qw{/etc/mtab}) {
    # ...
} else {
    # ...
}
[download]

update: or, perhaps a little more friendly,

if (local @ARGV=qw(/etc/mtab) and grep /nfs/, grep m{/home}, <>) {
    # ...
} else {
    # ...
}
[download]