Can I submit more than one domain?

I am the webmaster for various sites I have created for various people, none relating to the other. I would like to submit (attempt to submit) all the sites to the ODP in the appropriate categories.
I am aware that only some if any may be listed, if excepted, but would I be breaking any guidlines of the ODP if I were to list more than one domain (none are mirror sites, all are unique)? I read through the guidelines and saw that mirrors sites (basically same sites, different domain names, or sites of similar nature) are a no no, but nothing on what I'm requesting.

Thank you in advance
Lara

If they are really not related to each other in any way (other than the fact that you built their web sites) then by all means go ahead and suggest them to the most appropriate categories.

Thanks