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Move the print statement as shown below. Current script:
awk -F, '
FNR == NR {
ip[$1 "."]
next
}
{ for(i in ip)
if(index($2, i) == 1) {
print
next
}
}' file0[12].out
Script...

A fairly simple way to do this with awk is:
awk -F, ' # Invoke awk to process your files with the field
# separator set to ",".
FNR == NR { # For lines in the 1st input file (the # of...

Indeed :) you are correct. I did not want to overcomplicate things, but file names with spaces occur quite frequently so I felt that was the most important note to make...

To complete the quest...

And that's an understatement. The approach also won't work if a filename contains a tab, single quote, double quote, or backslash. There is also the remote possibility that a file name of a single...