Unfortuantely, as div elements can't be direct descendants of table elements, the way I know to do this is to apply the CSS rules you want to each tr element that you want to apply it to.
| Test Table |
|---|
| 123456789 |
| 123456789 |
| 123456789 |
| 123456789 |
| 123456789 |
If you have more than one CSS rule to apply to the rows in question, give the applicable rows a class instead and offload the rules to external CSS.
| Test Table |
|---|
| 123456789 |
| 123456789 |
| 123456789 |
| 123456789 |
| 123456789 |