http://revach.net/article.php?id=975

Section: Halacha   Category: Tshuvos
Rav Shlomo Zalman Auerbach: Washing Netilas Yadayim in Middle Of Selichos?

When we wake up in the morning before we wash Netilas Yadayim we may not walk four amos or touch our eyes, ears, or mouth. If you wake up before Alos HaShachar you still need to wash Netilas yadayim but must wash once again after Alos. What happens if you are in middle of Selichos? Does everyone in Shul need to stop right after Alos and line up to wash their hands.

Rav Shlomo Zalman Auerbach says that you can first finish selichos and then wash. In the interim it is permitted to walk more than four amos and touch your eyes, ears, and mouth. This Halacha he says also applies to someone who wakes up early to learn or similar activities.