OUTER:
for (...) {
    next OUTER if $cond1;

    INNER:
    for (...) {
        ...
        last INNER if $cond2;
        ...
        next OUTER if $cond3;
        ...
        last OUTER if $cond4;
        ...
        next INNER if $cond5;
        ...
    }

    last OUTER if $cond6;
}