OK, this is not possibly by standard, but it is possibly with small customization.
You need to mak new page based on table Journal Line Dimension. When you open this page from journal, system must set:
-Table ID = 83
-Journal Template Name = same as journal
-Journal Batch Name = same as journal
You need some function to put all Line No. from journal to Journal Line No.
After that, you can fill dimension fields. If you have more dimension per line number, you need to create the same line in page and mew dimension.