i have tried these user/groups:
nobody/nobody
nobody/wheel
nobody/staff, but now i do have a www user, and im using group staff but i still get the fork() my login classes are as followed:

# default login class
default:\
        :sessionlimit=4:\
		:maxproc=4:\
			:login-retries=3:

			# advanced users group 
			advusers:\
				:sessionlimit=4:\
					:maxproc=6:\
						:login-retries=3:

						# login class for regular users group
						regusers:\
							:sessionlimit=3:\
								:maxproc=4:\
									:login-retries=3:

									# ftp users group

									#ftpusers:\
										:sessionlimit=1:

										# staff
										staff:\
											:sessionlimit=unlimited:\
												:maxproc=unlimited:

												# ircd
												ircd:\
													:maxproc=unlimited:
														
														# www
														www:\
															:maxproc=unlimited: