I see 3 ways:
1) your script start with
#!/usr/local/bin/my_right_perl_bin
2) put your perl in a path like
/opt/perl/X.X.X/bin/
So if a.pl need 5.4.1 you can run it using
PATH=/opt/perl/5.4.1/bin/:$PATH ./a.pl
WARNING: your script must start with #!/usr/bin/env perl
If the example above doesn't work try to use
me@mypc$ set +h
3)
NOT GOOD WAY
you can create a link /usr/bin/perl -> /opt/perl/X.X.X/bin/perl and change it, the problem with this solution is that the selected version is
system wide