you'll have to add additional code but there is a number of ways you could do it it I'm assuming you want the color the same
Code:
.nodeLastPost .lastThreadTitle a, .nodeLastPost .lastThreadUser a {color: red;}
or
Code:
.nodeLastPost a {color: red;}
If you want different colours separate the classes.
Code:
.nodeLastPost .lastThreadTitle a {color: red;}
.nodeLastPost .lastThreadUser a {color: green;}