I am guessing: you want the bits with T<odd number> first, then T<even number>? Here is one way to do it:

use strict;
use warnings;
$_ = "T1 CONT 11 100.00 0 0.00 | T2 IEB 11 100.00 0 0.00 | T3 IEB 11 1
+00.00 0 0.00 | ".
        "T4 ICBO 11 100.00 0 0.00 | T5 ICBO 11 100.00 0 0.00 | T6 BVEB
+ 11 100.00 0 0.00 | ".
        "T7 VFBE 11 100.00 0 0.00 | T8 VFBE 11 100.00 0 0.00";

# dirty grep with side effects...
print grep { (/^\s*T(\d+)/)[0] % 2 ? !print : 1 } split /[|]/;
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