for my $info ( 
# This ^^^^^ var will be set to the hashref each of the ...
    grep{ exists $ProcsOfInterest{ lc $_->{ Name } } } @proc_info
# ...............^^^^^^^^^^^^^^^^ processes of interest
) {
# ........................and is used here  vvvvv
    printf "%-25s %14d %12.6f %14.7f\n", @{ $info }{ @fields };
# .......................in a hash slice ^^       ^^         ^
# ............................with the field names   ^^^^^^^
# ..to produce the wanted 4 values and supply them to printf
}